Follow the Danish golden eagles
In 2015 two golden eagle chicks had GPS tags mounted on their backs. One was a male hatched in April in Høstemark Forest in Lille Vildmose, Denmark and the other was a female hatched in May in Tofte Forest also in Lille Vildmose. The eagles have been named by the location of their hatching: Hostemark (navy blue) and Tofte (orange).
Since 2015 the GPS tags have sent data on the whereabouts of the two eagles, and on this site you can follow their journey. You can read more about the project below the maps and watch a video on the mounting of the GPS tags in the right pane.
The maps are updated with GPS data every week and the "Current Status" is updated every or every second month.
2020 Map - Tofte2015 and Hostemark2015
Current status (mid January 2020)
We have just addad a new map for Tofte2015 and Hostemark2015. Hals Sønderskov is still the primary habitat of the two Golden Eagles from 2015. The battery on the GPS-tag of Tofte2015 has been low in power, which means it has send fewer positions in the beginning of the new year. We have adjusted the duty cycle of both tags to conserve battery. This means we will recieve fewer positions from the birds. We will likely increase data transmitions in line with the increasing daylight.
As mentioned the GPS-tag on the juvenile Toftehan19 (tagged in June 2019) stopped transmitting data in the end of October 2019. After more than two months the GPS-tag seems to have regained power and has send a few positions from Toftehan19. The juvenile Golden Eagle is still alive and is currently staying in Northern Denmark. If we continue to recieve data, we will shortly add a new map with the whereabouts of the third GPS-Golden Eagle in Denmark, Toftehan19.
If you observe a Golden Eagle with a GPS-tag or a leg-ring we would always like to hear from you. Please contact: email@example.com
2019 Map - Tofte2015 and Hostemark2015
2018 Map - Tofte2015 and Hostemark2015
2017 Map - Tofte2015 and Hostemark2015
History: 2015 - 2018 - Tofte2015 and Hostemark2015
Golden eagles in Denmark
The golden eagle started breeding in Denmark in 1998 and the population now seems stable with three breeding pairs. Since 1998, a total of 37 juveniles have successfully fledged. Of these, 16 chicks have been ringed and three had GPS tags mounted. Except for the three GPS chicks the destiny of golden eagles hatched in Denmark remain unknown.
Why are we tracking them?
In a new Danish research project, we are tracking juvenile golden eagles with GPS technology to understand their movement patterns and use of non-breeding areas. The technology allows us to explore their habitat use and home ranges across the annual cycle. The information we gather will help determine the source population to the Danish breeding birds and investigate genetic relationship within the Danish population. The birds have already shown large individual variation in movement.
How do we do it?
We mounted a GPS/GSM transmitter on the juvenile golden eagles while they were still in the nest, using a near-adult size harness to ensure a proper fit. The transmitters are mounted with a body-harness following the same technique as has been used on golden eagles in e.g. North America and Sweden. The transmitters are charged by a solar panel and will in theory work throughout the lifetime of the bird. GPS-positions are stored in the transmitters and sent via GSM-network.
Anders P. Tøttrup, firstname.lastname@example.org
Jan Tøttrup Nielsen, Kasper Thorup and Cellular Tracking Technologies. The project is in collaboration with the Copenhagen Bird Ringing Centre at the Natural History Museum of Denmark. The project is funded by Aage V. Jensen Naturfond.
End november 2019
Tofte2015 and Hostemark2015 are still spending most of their time in Hals Sønderskov, where they have at least one nest. They still take trips to Høstemark- and Tofte Skov, where they hatched in 2015. But both eagles never leave their territory at the same time. So the trips to Lille Vildmose are made separately. Both GPS-tags are now in “winter mode” to preserve batteries.
As mentioned in last update the eagle named Hals2015 was found in poor condition suffering from severe lead positioning. Fortunately Hals2015 made a full recovery and has been released. We recovered the GPS-tag, which had not been transmitting data since 2015. The tag has been shipped back to the manufacturer for diagnostics. This will reveal whether the tag has logged data from Hals2015’s whereabouts, but simply has not been able to transmit it. This would indeed be exciting and we have our fingers crossed.
During summer and fall the new GPS-eagle Toftehan19 continued to make more and longer flights from its nest in Tofte Skov. The chick had the tag mounted on June 10th 2019 and it has transmitted data as scheduled. But suddenly the battery in the tag discharged and stopped transmitting data. We have set the tag in energy saving mode, and we hope it will start transmitting data again. From the data it transmitted it appears that Toftehan19 fledged between the 15th and 19th of October - almost the exact same time when Tofte2015 and Hostemark2015 fledged in 2015, on the 14th of October.
Start August 2019
In the month of July and the beginning of August, both Tofte and Hostemark have stayed in Hals Sønderskov only interrupted by Hostemark who took a round trip to Tofte Sø from the 8th to the 9th of July.
In the last update we reported a sighting of the Golden Eagle Hals that has been flying with a defect tag since 2015. By the end of July Hals was found in an enclosure used for raising pheasants, unable to find its way out. Hals appeared weakened and was taken for examination. This revealed that Hals was suffering from severe lead poisoning but otherwise in good condition. The source of the lead poisoning is still unknown, and Hals has been recovering in an animal shelter, and the defect GPS-tag has been removed. If Hals’ condition continues to improve, it is scheduled for release within a few weeks.
Last time we also reported that two chicks (one female and one male) of the breeding pair of Golden Eagles in Tofte Skov had GPS-tags mounted in the beginning of June 2019. In the following time GPS-data showed that both chicks began to fly around in the area of the nest. But sadly the female was found dead underneath the nest in July.
The male is beginning to make longer flights but still within a 200 meter radius of the nest. We keep a close eye on the data we get from Toftehan19, and have great hopes that it shortly will leave the nest.
Mid June 2019
Quite some time has passed since our last update. However, we return with great news: Tofte and Hostemark has found new partners, a new sighting of a well know Golden Eagle and two new Golden Eagles in Denmark now send GPS-data.
In March, we noticed Tofte spent more time in Hals Sønderskov than previously observed. Hals Sønderskov is the forest where Hostemark has been nesting with an older female for the past two years. The GPS-data in March indicated that Tofte and Hostemark were interacting and we decided to find out what was going on. This lead to the conclusion that the old female was no longer in Hals Sønderskov. Besides, Tofte was seen flying of a nest in the forest. This indicated that Tofte and Hostemark could be breeding. Golden Eagles are very sensitive to disturbances in the breeding season, so we decided to hold off from updating the webpage for a while. It is with great excitement that we now confirm that Tofte and Hostemark make up a new pair of Golden Eagles in Denmark.
The fact these two GPS-tagged Golden Eagles in Denmark now make up a pair is quite the coincidence. All though Tofte and Hostemark did not succeed in breeding this year, we have our fingers crossed that they will succeed next year. If this happens, the GPS-tags on Tofte and Hostemark will provide us with interesting and valuable data on the movements of parenting Golden Eagles in Denmark.
In other news the Golden Eagle from Hals, which also was GPS-tagged in 2015 was spotted on June 6 2019, in Råbjerg Mose, Ålbæk. Hals has been spotted a few times since it fledged in 2015. Unfortunately, its GPS-tag stopped working shortly hereafter, so we do not receive data from Hals. Reports from the occasionally sightings of Hals all agree, that it seems to be in good condition.
On June 10, two new Golden Eagle chicks had GPS-tags mounted in Tofte Skov, Lille Vildmose. The chicks were siblings and around 60 days old at the time of mounting. One was male and the other female and both in good condition, all though the male was a bit smaller. Both GPS-tags now send data and when they leave the nest, we will be updating the page with a new map of the two new GPS-Golden Eagles in Denmark.
By end January Tofte was in Tofte Skov. From there it flew to Melholt Rimmer west of Smalby on the 31st of January. In February we didn't get data from Tofte before the 5th, where it appeared in Hals Sønderskov, the home range and nesting site of Hostemark. Tofte stayed in Hals Sønderskov for a few days. On the 8th Tofte reappears in Melholt Rimmer. The next day Tofte flies to Gettrup Skov, but it quickly returns to Melholt Rimmer and stays here until the 14th. On the 15th it flies south to Tofte Skov and Mose via. Hals Mose and Høstemark Skov. The next day Tofte makes a round trip west to Volsted Plantage, Gerding, and East of Fræer via. Lyngby, Ravnborg Skov and Møgelholt and then returns to Tofte Skov and Mose on the 22nd. Tofte stays in this area for 5 days. On the 28th Tofte makes a quick revisit in Volsted Plantage and then flies north to Hals Sønderskov, where it stays for the first three days of March.
Hostemark has spent the entire month of February in Hals Sønderskov.
Hals Sønderskov measures roughly 5 km2, and with Tofte spending at least 6 days in the forest in the month of February, the two eagles, Tofte and Hostemark, must have been interacting. Golden Eagles are known to be aggressive towards intruders in their home range. Usually, they scare the intruder off by making downward aggressive flights towards them. Direct physical fights between Golden Eagles is rarely seen, but when they occur they can be fatal.
End January 2019
The map for 2019 is now online and the 2018 map has been updated with data for the last weeks of December.
The GPS tag of Tofte is struggling to maintain battery voltage. This means we get less and more sporadic data from Tofte. In January 2019 Tofte is still very active. In the beginning of the month it was near Try north of Limfjorden. It then flew south past Hals Sønderskov to Vester Lovnkær, just north of Mariager Fjord. On the 21st of January Tofte was east of Håls near Refsnæs Skov.
The GPS tag of Hostemark is more stable and we are receiving good data on it's whereabouts. But like the most of last year, Hostemark has spends most of it's time in Hals Sønderskov.
Start December 2018
In the beginning of November Tofte spent some days in the area between Komdrup, Håls and Gudum. On the 13th it flew east to Tofte Skov, where it stayed until the 19th. Between the 19th and 30th of November we only have 23 GPS-fixes from Tofte. But some of these fixes show Tofte in a new area east of Madum Sø on the 24th of November. The last GPS-fixes from Tofte in November are on the 30th where it is west of Høstemark Skov.
Hostemark is still in Hals Sønderskov. The GPS-unit on Hostemark has kept a stable battery voltage and is recording GPS-fixes every 30 minutes.
Start November 2018
Tofte started the month of October just north of Dronninglund Storskov. On the 2nd it flew south to Gettrup Skov where it stayed for some days. On the 7th it continued south to Toftesø in Lille Vildmose. On the 10th Tofte flew past Portlandsmosen to Refsnæs Skov. On the 19th Tofte flew south and for the next 10 days it visited several forests in the same area: Viffertsholm Dyrehave, Hovskov, Eendelen and Ravnborg Skov. On the 30th Tofte was back in Refsnæs skov.
Hostemark spent the month of October within, and in the nearest vicinities of, Hals Sønderskov.
Start October 2018
Hostemark started the month of September by flying back and forth between Hals Sønderskov and Tofte Skov in Lille Vildmose. Between the 7th and the 30th Hostemark stayed in Hals Sønderskov, only interrupted by a short trip to Høstemark Skov on the 24th.
Tofte departed from Måstrup Mose, west of Hvims, on the 4th of September to an area north of Vester Aslund Plantage. On the way it made stops in Nørgård Plantage and Børglumkloster Skov and the trip lasted for a full day. On the 13th Tofte flew to Melholt Rimmer west of Smalby where it stayed until the 16th. Tofte then flew south, and between the 17th and 27th it frequented Tofte Sø, Tofte Skov, Portlandsmosen and Refnæs Skov south of Gudumlund. On the 28th of September Tofte flew north to the outskirts of Dronninglund Storskov, southeast of Dorf.
Start September 2018
After staying south of Try for a day Tofte once again flew north to the area between Hvims, Jerup and Bindslev. On the 7th it flew south back to the area south of Try where it stayed until the 24th. Between the 25th and 30th Tofte first flew to Lille Vildmose, more accurately to Tofte Mose, just west of Tofte Skov, where it hatched more than 3 years ago. Tofte then flew to the area between Nørre Kongerslev, Komdrup, Stærhøj and Gudumlund. On the 27th Tofte flew by Hals Sønderskov and stayed near for a few days. It then returned back north back to the area between Hvims, Jerup and Bindslev.
On the 17th of August Hostemark made its first longer flight in months and flew to Hostemark Skov in Lille Vildmose, where it hatched more than 3 years ago. It then returned to Hals Sønderskov and stayed until the 25th, where it took a short trip to Hals Mose. Hostemark returned and stayed in Hals Sønderskov for the rest of August.
Quite the co-incidence that both Tofte and Hostemark visited the places they hatched with only 8 days in between. In the few days Tofte is in Hals Sønderskov, the GPS-points suggest that Tofte and Hostemark must have been within close proximity of each other. Usually Golden Eagles are quite territorial, so there might have been a fight between Tofte and Hostemark or its mate. If you have any observations we would like to hear from you. You can write to: email@example.com
Start July 2018
In the month of July Tofte stayed in the area between Try and Øster Hassing, west of Gettrup Skov for the first two weeks. On the 12th Tofte flew to the area between Nørre Kongerslev, Håls and Gudumlund. Two days later it flew approximately 50km north to Børgumkloster Skov. Here it stayed until the 27th and then returned to the area between Try and Øster Hassing.
Hostemark spent the entire month of July in Hals Sønderskov, where it made regular trips to its hunting grounds west of Hals Sønderskov, presumably to find sufficient amounts of prey to feed its very first chick in its nest in Hals Sønderskov.
Hostemark has hereby become one half of a new breeding pair of Golden Eagles in Denmark. With this new addition we now have a total of 5 breeding pairs of Golden Eagles in Denmark.
Start June 2018
Besides a trip to the area south of Hvims with a few stops in Børgumkloster Skov between the 20th of May and 11th of June, Tofte has been spending the rest of June and beginning of July in an area West of Gettrup Skov.
Hostemark remains in Hals Sønderskov.
Spring is here and we have changed the duty cycle of the GPS-tags to summer mode. This means we will get data points every 15 minutes, 24 hours a day.
In April Tofte spent the days between the 2nd and 10th in Northern Jutland in the area between Hvims, Jerup, Dvergetved and Bindslev. It then flew south to the area between Try, Øster Hassing and Grindsted, where it stayed for the rest of April.
Hostemark is still in Hals Sønderskov. We hope that the nest Hostemark has built has eggs in it by now.
Start April 2018
Hostemark remain stationary in Hals Sønderskov with occasional trips to its “hunting ground” west of Hals Sønderskov. Hostemark has attracted a mate and they have built a nest. We have our fingers crossed that the two eagles will become a new breeding pair in Denmark.
Tofte is still on the move. From the 1st - 18th it flew back and forth between the area between Try and Langholt and an area north of Nørre Kongerslev, making stops in Hals Sønderskov. On the 19th it flew west south of Vegger and then continued south all the way to Sunds just north of Herning. Hereby it easily travelled more than 100 km in a single day. From the 20th - 28th it stayed in the plantations north of Grønhøj. In the last days of March Tofte flew northeast with the first stop in Lindum Skov, before reaching Tofte Skov on the 31st.
Start March 2018
In the month of February Hostemark and Tofte meet two times.
From Hals Sønderskov Hostemark still makes regular trips to an open area south of Holtet. As mentioned last month the frequency of the visits and habitat type, could indicate that this area is used as hunting grounds by Hostemark. On the 12th of February Hostemark flew east to Koldkær and Hals Østermark and on the 24th if visited Egense Klosterskov south of Limfjorden.
Between the 1st and the 19th of February Tofte stayed in the area between Try, Vester Aslund Plantage and Uggerhalne. On the 21st if flew east to Mel Holtgård Skov, Smalby and Østerled and from here it flew south. On the 22nd Tofte made the first visit to Hals Sønderskov and judging from the data the two eagles appears to have been interacting. Tofte continued south on the same day to its birthplace (Tofte Skov) where it stayed for a few days. On the 25th Tofte flew to Solbjerg Enge, before flying north to its second visit in Hals Sønderskov on the 28th. The data indicate that the two eagles also interacted during the second visit.
Start February 2018
In the first month of 2018 Hostemark still stays most of the time in Hals Sønderskov from where it makes trips to nearby locations: Egensekloster Skov and the northern part Høstemark Skov (on the 1st and 28th of January) and to what could be hunting grounds: an open rural area between Gåser, Holtet and Mølholtvej, where Hostemark went more than 10 times during the month of January.
Between the 1st and 11th of January Tofte stays in the area between Vester Aslund Plantage, Holtegård Plantage and Gettrup skov. On the 12th it flies east to Meltholt rimmer where it spends a few days, before continuing north to an area between Dorf, Agersted and Skarpholt Plantage, where it stays until the 27th. From here Tofte flies south to an area between Try and Vester Aslund Plantage and stays for the last 4 days of January.
Start January 2018
Hostemark has as usual spent most of December in Hals Sønderskov. But on the 5th of December if flew north to Hals Mose, where Tofte also was. This marks the first meeting between the two eagles for almost exactly one year. The last time they met was on the 17th of December 2016, where Hostemark also flew to Hals Mose to meet with Tofte.
After the meeting, Hostemark flew past Gettrup Skov and Vester Aslund Plantage, before it returned to Hals Sønderskov on the 11th of December, where it stayed for the rest of the month.
During December Tofte has been lying back and forth from Vester Aslund Plantage, Gettrup Skov, Melholt, Smalby and Hals Mose. After the two eagles met Tofte stayed in Hals Mose until the 25th of December where it took off east to Gettrup Skov and Vester Aslund Plantage.
Start December 2017
Winter is here and so are shorter days with less sunlight. Therefore we have to conserve battery power, to make sure the GPS-tags does not run dry of battery. This means that now the tags only transmit data three times per week and only log the Eagles’ positions every 30 minutes and so there will be less new data to add each week.
In the case of Hostemark the fewer positions seem to have made little difference since it has spent the entire month of November within Hals Sønderskov.
Tofte has flown between Vester Aslund Plantage, Gettrup Skov and Melholt Rimmer west of Smalby. On the 29th of November Tofte flew to Hals Mose and with Hostemark in Hals Sønderskov, the Eagles were only 5 km apart!
Start November 2017
In the last month, Hostemark has spent the most of the time in Hals Sønderskov and in the nearest proximity. One of those places is an area of farmland between Mølholt and Holtetgård where it has been on the 1st, 4th, 12th and 14th of October. We are guessing that Hostemark could be using the area for hunting. Besides these shorter trips, Hostemark flew to Tofte Skov on the 27th of October. This marks it’s fourth trip to Tofte Skov in 2017 (once in April and two times in August).
For the month of October Tofte has stayed in the area west of Smalby where it flies between different locations: Melholt Rimmer, Melholtgård Skov, Gettrup Skov and the area between Vester Aslund Plantage and Gettrup Skov.
Start October 2017
Apart from a trip to Hals Mose on the 15th of September and two trips to Høstemark Skov on the 18th and 30th, Hostemark has remained in its primary habitat: Hals Sønderskov.
Tofte, on the other hand, has been on the move during September. On the 10th of September Tofte flew south with the first stop in Kragskov Hede on the 12th. It then continued south with a stop East of Nejsum Hede and Pajhede Skov on the 15th. On the 17th it reached Gettrup Skov and Smalby, where it stayed for the rest of September.
With Hostemark in Hals Sønderskov and Tofte in Smalby the two eagles are only 8km apart.
Start September 2017
In the month of August Hostemark has been on the move: on the 16th it flew to the southern part of Tofte Skov, on the 19th it flew north of Smalby and on the 27th it flew revisited Tofte Skov, with a stopover in Høstemark Skov. This is the most south the eagle has been since the 22nd of April 2017, where it also flew to Tofte Skov and the most north since May 2016, where it made its overall longitudinal peak in Dyrheden Skov. By the 2nd of September Hostemark is back in Hals Sønderskov.
Tofte still mainly resides in Råbjerg Mose and during the last month, it has made one longer trip south of Kragskov Hede at the 10th of August, before returning to the central part of Råbjerg Mose again on the 20th of August.
Start August 2017
In the latest period Hostemark still has Hals Sønderskov as its main habitat, all though it has made a few trips to other areas: on the 17th of July, it flew to Limfjorden. It then made three trips to an area northwest of Hals Sønderskov on the 23rd, 25th and 27th of July. This area is farmland and the data show that Hostemark has been flying at low altitudes, indicating that the eagle has been hunting here. If anyone has seen an Golden Eagle in this area we would like to hear from you. Also, we would also highly appreciate any ground-photos of the area between Aalborgvej, Sønderskovvej and Mølholtvej (9370 Hals). Contact info can be found at the bottom of this page.
On the 6th of July Tofte departed from the southern part of Råbjerg Mose, and flew back to the northern part - the area between Lyngshede and Jerup Hede. Here it stayed for the rest of July with except on the 22nd and the 23rd of July where it flew to Ålbæk Klitplantage and Jerup Hede. Tofte has now spent the most of two months in Råbjerg Mose.
Start July 2017
Since the last status update, both Golden Eagles have been rather stationary.
Tofte has moved south from the area between Lyngshede and Jerup Hede, and has spent the most of the last month in the most southern part of Råbjerg Mose.
Hostemark remains in Hals Sønderskov.
Because of the summer holidays, the next update of the GPS-tracks will be in the beginning of August.
Start June 2017
Except for a recent trip Høstemark Skov between the 1st and 5th of June, Hostemark has remained in Hals Sønderskov in the latest period.
Tofte is still on the move. From Nejsum Hede it flew north and stayed just south of Lendum and in Børglumkloster Forest between the 6th and 20th of May. The signal then disappeared for a day. The 22nd of May Tofte reappeared in the area between Jerup Hede and Lyngshede (some 20 km north-east of Lemdum), where it since has stayed.
Start May 2017
Hostemark har been spending most of its time in Hals Sønderskov, which has remained its primary habitat since Septmber 2016. Hostemark still makes regular visits to Lille Vildmose, and at the 18th of April it made a one-day visit to Portlandsmosen. From the 22nd – 24th of April it flew South to the Southern part of Tofte Skov, before returning to Hals Sønderskov where is has stayed from the 25th of April – 3rd of May.
Tofte remained stationary in the Try Enge area until the 22nd of April, where it flew East to Smalby and Melholt. From the 25th – 29th of April it stayed in Melholtgård Skov and at the 30th of April it flew North via. Dronninglund Storskov towards Pajhede Skov and Nymølle Plantage. Tofte then continued East and from the 1st – 3rd of May it has stayed in an area between Nejsum Skov and Voers Å. An area with only smaller patches of forest (3 – 6 ha) surrounded by farmland.
Start Arpil 2017
In the last month, Hostemark has remained quite steady in Hals Sønderskov. Between the 20th and 23rd of March it made a short round-trip; first to Hals Nørreskov, Hals Mose and Vesterhede, then onwards to Høstermark Skov and Tofte Sø before returning to Hals Sønderskov. Since then it has made a few visits to Egense, Mou and Høstemark Skov, but Hals Sønderskov remains its primary habitat.
Tofte reappeared in Ormholt Skov near Thorshøj at the 8th of March. From here it has flew south passing Dronninglund Storskov to Try Enge and the area between Vester Aslund Plantage and Gettrup Skov, where it stayed until the 23rd of March. It then flew east and stayed just North of Hals Mose for a couple of days. With Hostemark in Hals Sønderskov, the two eagles were only 7km apart at that point. Tofte then returned to Try Enge via. Mel Holtgård Skov.
Start March 2017
Hostemark still spends most of its time in Hals Sønderskov, though it has made a few trips to Høstemark skov, Hals Nørreskov and Koldkær. The tag sent a full dataset except the days between the 5th and 9th of February. Tofte has been flying north. From Gettrup Skov it flew northwest to Holtegård Plantage. From there it continued north to Dronninglund Storskov and Skarpholt Plantage, and by end February it reached the area between Ørnedalen, west of Sæby, and Skrolhøj, south of Karup. We did not receive data from Tofte between the 1st and 7th of March.
Mid January 2017:
The two young eagles met each other briefly in the area North of Hals Mose on the 17 December. Subsequently, they went in different directions and Hostemark flew back to stay in Hals Sønderskov, interrupted by a trip down to Mariager Fjord. Tofte flew to the eastern part of Bolle enge and Gettrup Skov, but due to low battery level we are now only receiving irregular transmissions from Tofte.
Mid December 2016:
Hostemark has left Hals Sønderskov and is now just north of Hals Mose. Tofte is still in the farmland north of Hals Mose, and the two birds are now only three kilometres apart.
Mid November 2016:
Hostemark is still in Hals Sønderskov, where it has been for 3 months now, only interrupted by a few short trips to Tofte Skov, Høstemark Skov and Store Vildmose. Tofte left the farmland area south of Bolle Enge, and moved to Hals Mose and farmland north of here.
Mid October 2016:
Hostemark stayed in Hals Sønderskov, only interrupted by two short trips to Tofte Skov and Store Vildmose. Tofte left the area around Råbjerg Mose after 1½ month here. Since the end of September it has been in a farmland area south of Bolle Enge, still in northern Jutland.
Mid September 2016:
Hostemark left Lille Vildmose and moved to Hals Sønderskov where it has stayed for four weeks now. Tofte left the Skagen Peninsula after three months, but it only moved a short distance south and has been staying in an area just west of Råbjerg Mose.
Mid August 2016:
Hostemark has returned to Lille Vildmose once again. Tofte is still in the same very small area at Skagen Peninsula.
Mid July 2016:
Hostemark left Lille Vildmose again and stayed in an area south of Grindsted that it also visited in both early and mid May. After a month it moved to northern Djursland, where it currently is. Tofte stayed at Skagen Peninsula, all the time within a very small area at Hulsig Hede.
Late May 2016:
Hostemark left Lille Vildmose to tour around central and northwestern Jutland only to go back to Lille Vildmose. Tofte went quickly through all of Jutland to reach the Skagen Peninsula. It was seen by birdwatchers at “Flagbakken” near the tip of the peninsula, before it moved a little further south and stopped.
Early May 2016:
After coming back to Denmark Hostemark took a trip around most of Funen before going back to Jutland and in a quick pace back to its origin in Lille Vildmose. Tofte is also back in Denmark now, crossing Flensborg Fjord in almost the exact same place as Hostemark followed by a swift migration up through Jutland.
Hostemark has started moving north and crossed the border into Denmark after nearly six months in Germany. It crossed Flensborg Fjord and is currently stationary east of Christiansfeld. After five months near Wittensee, Tofte has moved 20 km north and might also be on its way back to Denmark.
Both birds are in northern Germany. Hostemark has started exploring a new area east of Kiel near the lake Selenter See. Tofte has remained near lake Wittensee.
Tofte is spending her time near lake Wittensee, while Hostemark is further north in the areas of Winnemark og Waabs. The gps signals have picked up and are now sending data back more frequently. The last couple of weeks of more sporadic data, was most likely due to insufficient solar panel recharging
The birds fly south through Jutland to Germany in different pace and along seperate routes. They seemed to join up in the same area between Sleswig and Rendsburg.
October 14th 2015:
Both birds leave their home territory. Hostemark may have attracted Tofte to leave as the birds flew together for the first 5 km.
The eagles stay almost exclusively within the forest in their home territory.
GPS-tags mounted on golden eagles (video)
In June 2015 golden eagle juveniles were equipped with a GPS-tag, enabling scientists to track their movements. Click play to see how it was done.
I 2015 fik to kongeørne fra Lille Vildmose, nordøst Himmerland påført GPS-sendere; én han fra Høstemark Skov klækket i april, Hostemark (blå) og én hun fra Tofte Skov klækket i maj, Tofte (orange).
Opdatering af hjemmesiden
Kort opdateres med GPS-data hver uge, og den aktuelle status opdateres i begyndelsen af hver måned. Du kan læse mere om projektet under kortene.
Få ynglende kongeørne i Danmark
Efter mange års fravær har der siden 1998 fast ynglet kongeørne i Danmark. Siden 2011 har der kun været 3 ynglepar, som tilsammen har fået 36 unger på vingerne. 16 af ungerne er blevet ringmærket, men med undtagelse af tre unger, er deres skæbne ukendt. At antallet af ynglepar af kongeørne ikke stiger, har indtil videre været et ubesvaret spørgsmål. De to GPS-sendere giver indblik i hvor de danske kongeørneungers færden, og måske svar på, hvorfor antallet af ynglepar i Danmark ikke stiger.
Siden opdateres løbende på engelsk.