Identification Guide to European Passerines
Essential guide for ringers working in the field and birdwatchers. Designed to help determine species, age and sex of birds in the hand.
Paperback reprint of 4th edition.
This Ringer's bible is completely revised and updated to include 229 species, with valid subspecies, of passerines regularly occurring in Europe, plus some rare vagrants. Data include wing formulae, measurements, plumage, and other criteria for determining sex and age. It also includes indices of English, Finnish, French, German and Swedish names. It is an invaluable text for any ringer or keen birder.
What effect might annual releases of non-native gamebirds be having on native biodiversity?
Henrietta Pringle reveals the work behind a recent paper on gamebirds and predation
Climate change in a warming world
BTO science contributes to our understanding of future scenarios, and informing policies and conservation management strategies to help species adapt.