Why do birds get smaller?
How long-term winter bird ringing unravels body size shrinking in response to climate change
Do crossbill calls change over time?
Covering 58 years of crossbill recordings
How does weather affect songbirds?
Analysing avian body condition across the southeastern United States
Being larger against all odds
Mediterranean Yellow-legged Gulls are larger and have longer wings than their Cantabrian-Atlantic conspecifics
Being similar, nesting different
Can the choice of nesting site facilitate species coexistence?
The smell of flycatchers
Chemical analysis reveals social information in preen oil
Are long tails all about sex?
A review of functions of avian elongated tails
Exposure to parasites in agroecosystems
Attracted by agroecosystems: Benefits of and threats to resident and migratory American Kestrels in Baja California peninsula
Body condition and reproduction in declining diving ducks
Increased body condition affects duck egg mass and hatchability
The mysterious basis of egg shape in birds
How do birds produce asymmetrical eggs?