Two new articles are added to the site!
Citrine Wagtail ID: do flight calls tell us which subspecies is involved?
Could calls shed some light on the subspecies that reach NW Europe as vagrants? Maarten Wielstra collected a team of people to work on an analyses to find out if the calls of various ssp. differ on their breeding grounds. See more here.
Hybrid redstarts in Europe and North Africa: an analyses of 121 hybrids
Nicolas Martinez, Bern Nicolai and I wrote a British Birds paper on redstart hybrids. A summary of the analyses can be found here.