Dutch corncrake news


This is a video about a singing corncrake (with chiffchaff sound in the background).

Translated from the Dutch Sovon ornithologists:

Friday, July 3rd, 2015

To hear the raspy sound of the mysterious corncrake, this spring you had to go primarily to Groningen province. Nearly three-quarters of the birds counted are in this province, especially in the vast grain and alfalfa fields of the Oldambt region. This is evident from the special census Sovon has been organizing since 2000.

Seal pups live on webcam


This video from the USA says about itself:

A harbor seal (Phoca vitulina) mother giving birth to a pup and their first swim. Footage was taken at a harbor seal rookery in southern Puget Sound, Washington during observations in 2004 under NMFS MMPA research permit # 782-1702. Video by Dyanna Lambourn, edited by Caitlin McIntyre, Washington Department of Fish and Wildlife.

Dutch conservation organisation Het Groninger Landschap reports today about harbour seals living in the Dollard estuary.

At the moment, there are about fifty seal mothers with pups there. You can see them full screen on a webcam, here.

Cuckoo calling, video


This video shows a cuckoo calling in Kardinge nature reserve in Groningen province in the Netherlands.

Maria Woortman made this video, hiding behind trees from her shy subject.

Dutch marsh harrier, all the way to Ghana and back


This video, from Spain, shows a female marsh harrier, a red kite and a raven quarreling about food.

Translated from the Dutch ornithologists of Werkgroep Grauwe Kiekendief:

Thursday, May 21, 2015

A newcomer to the GPS logger research is marsh harrier “Roelof”, an adult male provided last summer with a GPS logger. Roelof returned this spring to East Groningen, with a logger packed with GPS positions. He turned out to have had a highly remarkable journey! …

Roelof returned on April 15, 2015 in East Groningen, where he presented himself at the local antenna network where we can remotely read stored GPS data. …

In the autumn of 2014 Roelof flew via Spain to his first wintering area in Senegal, where he arrived on 27 September. This route falls exactly within the narrow migration flyway which is usual for marsh harriers. Christiane Trierweiler et al. described that harriers do not remain all winter in a single area, but during the winter they move to southern areas as the northern areas get dry. These are mostly trips of several hundred kilometers.

Roelof left his first wintering area on November 10 to land about 500 kilometers to the south in Guinea. To our surprise Roelof did not stay there until the end of the winter, but he left the area on January 26 to fly 1,700 kilometers along the West African south coast, eventually ending up all the way in Ghana! Ghana is really far away for a Dutch marsh harrier, outside the ‘normal’ wintering area.

On the shores of Lake Volta

In Ghana Roelof stayed around the shores of Lake Volta. This huge lake is probably a good wintering place for marsh harriers and the question is how he ever ‘found’ this place. Did he come here in his youth by chance, making the place by now a fixed point in his annual schedule? Or perhaps Roelof has eastern genes telling him that in winter this is the place to be? Monitoring young harriers will be the key to answering this kind of exciting questions.

Roelof left the Volta Lake on February 28, keeping a northwesterly course. Aided by a firm tailwind he was ‘blown’ across the Sahara until he reached the ocean coast in the Western Sahara. From there he continued his journey towards the northeast, where he made two short stops in Morocco (as befits a marsh harrier). From Morocco, he flew straight back to exactly the same reed bed in eastern Groningen …

This photo by Ben Koks shows marsh harrier Roelof, on the left, and his female partner. On Roelof’s back, one can see his GPS logger.

How marsh harrier William lives


This is a marsh harrier video.

Translated from the Werkgroep Grauwe Kiekendief in the Netherlands:

Thursday, April 23, 2015

From 2009 on, the Werkgroep Grauwe Kiekendief [Montagu’s Harrier Workgroup] uses state-of-the-art UvA BiTS GPS loggers to map the movements of individual Montagu’s harriers in detail. In the vast East Groningen fields, however, besides Montagu’s harriers also hen and marsh harriers live. To compare how these three harrier species use the countryside precisely, the GPS logger investigation was expanded in 2012 to hen and marsh harriers.

A cold drizzly spring day in 2012 turned out to be a historic day in the marsh harrier research. This day was when near Delfzijl the first marsh harrier was caught for the GPS logger research. The male, called ‘William’ turned out to wear an aluminum ring of the bird migration research station. The ring data showed that William at the time was two years old, and had hatched in exactly the same reed bed where he nested now.

Different hunting pattern

It was exciting to follow the movements of William during the breeding season. William flew remarkably often along ditches, making a map of its track show the East Groningen allotment pattern. This contrasts with Montagu’s marriers, which also hunt in the central parts of fields and meadows. That William prefered to hunt along ditch banks was also evident from the prey remains found at his favourite place to sit, a striking number of ducklings and water voles.

Starling murmuration attacked by bird of prey, video


This video shows a starling murmuration near Schildmeer lake in Groningen province in the Netherlands.

About nine seconds into the video, a bird of prey attacks the starlings.

Steven Weghorst made this video.

Arctic tern research in Svalbard, update


This video shows Dr Maarten Loonen, Arctic tern researcher at Groningen university in the Netherlands. In Svalbard, he holds Arctic tern Guusje, the first tern provided with a geolocator in Dr Loonen’s Arctic tern migration research on Spitsbergen island. If the glue of the ring around Guusje’s leg will be dry, then she will be released, to (probably) travel all the way to the Antarctic, and back to the Arctic.

The 39 terns provided with geolocators on Spitsbergen in 2013 have been named by 39 sponsors in a crowdfunding scheme. That scheme is now finished.

Of the 39 2013 geolocator Arctic terns, 13 individuals were caught again at the same nesting colony in Spitsbergen in 2014. The majority of the 2013 terns had not returned to the nesting site, as it suffered much from Arctic foxes stealing eggs.

The Arctic tern Beauty had already been ringed and provided with a geolocator in 2012; this bird was caught again in 2013, but not in 2014.

Names of the terns ringed in 2013 and recaptured in 2014: Anke, Benji, Henk de Groot, Inky, Jacobird, Jan Pier, Karmijn, Lubbe, Marjolein, Mystic, NoorDrenthe, Suzanne, Tom.

Names of the terns, ringed in 2013, and not caught again in 2014: Angelo, Annelies, Arctic Jewel, BenJeanette, Berna, Ellen, Flo, Frederico Segundo, Gerie, Gerrit de Veer, Guusje, Herman, Hidde, Imiqutailaq, Joanne, Jonathan, Krukel 1, Maamke, Maarten, Meliora, Riiser-Larsen, Ruth, SolarAccess, Stirns, Suzanne, Viti.

In 2014, also 18 Arctic terns nesting in Groningen province, in the Eemshaven harbour, in the Netherlands have been provided with geolocators.

This video by Maarten Loonen says about itself:

9 June 2013

I am joining Derick Hiemstra and Klaas van Dijk in the Eemshaven to observe and ring Arctic Terns. In this industrial area, activity is low and Arctic Terns have started breeding. On this location the world champions [in] migration distance were equipped with a geolocator two years ago and recaught one year ago. Today Derick and Klaas are doing their normal checks. They read colour rings but also metal rings from terns. Then we continue catching and ringing some breeding pairs. All this is part of my preparation for this summer field season on Spitsbergen.

20 Arctic terns nesting in the White Sea region in Russia got geolocators in 2014 as well.