​​When the ladies from bird hospital De Wulp sent me the shots of the Grey-cheeked Thrush taken into care last year, it really knocked me...

The 2018 ringing report for Meijendel, Wassenaar is out now! Download here (pdf; 4 MB; in Dutch only) English summary When the first day ...

There's a big if - but another big redpoll invasion could be in the making. The if depends on stuff like weather conditions, and the exa...

First proof that it's the nominate subspecies of Hume's Leaf Warbler that reaches Europe. Aerobics, the final countdown and warbler taxon...

Probable Russian Common Gull, 5 February 2012, Meijendel, Wassenaar, the Netherlands I don't like using measurements as a diagnostic feat...

With the current redpoll invasion in Europe, it was time to spend some words and pics on these wonderful birds. Redpolls all the way from...

Right. Chiffchaffs never stop to amaze me. But I now feel we're really getting somewhere. Only very recently Peter de Knijff and I wrote ...

Autumn 2016 was nothing less than perfect. But this autumn, well... it was a bit boring to be honest. I missed most good vis mig days, ri...

There are probably not too many primary moult scores for Great Skuas from Holland. But I've got one now! Since we usually only see them o...

On 21 June Gijsbert Twigt and I trapped a Spotted Redshank in Meijendel, Wassenaar - the first one ever to be ringed at the site, where r...