Search found 48 matches

by Albert de Jong
Sat May 04, 2019 4:57 pm
Forum: Caspian Gull
Topic: Caspian Gull colony at Lelystad, The Netherlands
Replies: 3
Views: 593

Re: Caspian Gull colony at Lelystad, The Netherlands

May 1st I visited the colony again and found 10 nest locations of pairs of seemingly pure Caspians. At 6 of it, I was able to have a quick look in the nest. They all contained 3 eggs, of which one clutch was already hatched. Concluding from that, the Caspians are at least 3 weeks earlier breeding th...
by Albert de Jong
Sat Mar 30, 2019 8:11 pm
Forum: Caspian Gull
Topic: Caspian Gull colony at Lelystad, The Netherlands
Replies: 3
Views: 593

Re: Caspian Gull colony at Lelystad, The Netherlands

And now what I really came for: the Caspians. Sorry for the wrong codes below. PontischeMeeuw_cachinnans_2019_3_30_pair1_Lelystad_XLDTfemale_partner_AlbertdeJong2.jpg PontischeMeeuw_cachinnans_2019_3_30_pair1_Lelystad_XLDTfemale_AlbertdeJong.jpg PontischeMeeuw_cachinnans_2019_3_30_pair1_Lelystad_XLD...
by Albert de Jong
Sat Mar 30, 2019 8:03 pm
Forum: Caspian Gull
Topic: Caspian Gull colony at Lelystad, The Netherlands
Replies: 3
Views: 593

Caspian Gull colony at Lelystad, The Netherlands

At the yacht harbour of Lelystad, Markermeer Lake, The Netherlands, a colony of LBBG and HG is situated on two groynes. Both species are monitored by aerial survveys (governemental department Rijkswaterstaat). LBBG is dominating the colony, with up to 200 pairs in recent years. HG has a couple of te...
by Albert de Jong
Wed Dec 10, 2014 9:02 pm
Forum: Other taxa & hybrids
Topic: Ringed l.michahellis x l.a. argenteus
Replies: 0
Views: 12332

Ringed l.michahellis x l.a. argenteus

Hi all, Yesterday we got this offspring of a known breeding pair michahellis x argenteus from 2013. This bird was ringed as a chick in the colony near Amerongen, Utrecht, The Netherlands on June 14, 2013 by Roland-Jan Buijs. He ringed it with black-yellow MT on the tibia. See also pair VI: http://bi...
by Albert de Jong
Tue Dec 17, 2013 7:55 am
Forum: Caspian Gull
Topic: Breeding numbers of cachinnans in Germany
Replies: 3
Views: 2128

Re: Breeding numbers of cachinnans in Germany

Thank you very much, Ronald! Sounds like an ongoing, fast expansion from Poland into Germany.
by Albert de Jong
Fri Dec 13, 2013 2:47 pm
Forum: Caspian Gull
Topic: Breeding numbers of cachinnans in Germany
Replies: 3
Views: 2128

Breeding numbers of cachinnans in Germany

Hello,

I am curious for the most recent number of breeding pairs of cachinnans in Germany. I couldn't find any up to date information on the web so far. Anybody?

Thanks in advance!
by Albert de Jong
Sat Oct 19, 2013 8:03 pm
Forum: location other - Netherlands
Topic: North Sea - pelagic
Replies: 0
Views: 2025

North Sea - pelagic

Apperently, the larus cachinnans could be a marine bird in winter. During a pelagic boattrip not far from the coastline of Texel, we found up to 14 different birds! One of it was ringed as PLVE [yellow], a well-known bird that has spent its first winter in Amsterdam. The table of today: Caspian Gull...
by Albert de Jong
Sat Mar 30, 2013 9:52 pm
Forum: location other - Netherlands
Topic: Limburg 28 03 2013
Replies: 11
Views: 4803

Re: Limburg 28 03 2013

Theo, what about the unmoulted secondaries? They have quite clean blackish centres in my opninion. (cf. http://www.lou.bertalan.de/gulls/m_phi.php?bid=148&grp=cachinnans%204-5cy%20january-june ) I would expect it more mottled or streaked for 4cy argentatus. Also, the tibia looks quite long and the b...
by Albert de Jong
Fri Mar 29, 2013 8:38 pm
Forum: Herring Gull
Topic: Argentatus with clipring - tayeri pattern
Replies: 5
Views: 3366

Re: Argentatus with clipring - tayeri pattern

Thanks Peter and Theo. Our first impression was cachinnans either. But I only had my binoculars and camera, since my scoop is in repair. I dind't know the p5 thing and was confused by the pattern. I guess it must have been Poland again. Nevertheless, it was the first time I saw a pair of cachinnans ...
by Albert de Jong
Fri Mar 29, 2013 4:00 pm
Forum: Herring Gull
Topic: Argentatus with clipring - tayeri pattern
Replies: 5
Views: 3366

Argentatus with clipring - tayeri pattern

Today me and Frank Majoor observed a pair of most likely argentatus Herrings on the dump of Barneveld. The male was wearing a clipring at the left tarsus. We were not able to read it due to the distance. While approaching the birds, they flew off. Interestingly, the male was showing a tayeri-patter ...