Animal integumentary coloration plays a crucial role in visual communication and
camouflage, and varies extensively among and within species and populations. To …

Ecology Letters (2011) 14: 625–634 Abstract Condition is a nearly ubiquitous term in the
behavioural, physiological and evolutionary ecology literature; however, existing definitions …

The first comprehensive review of all aspects of the biology of moult, drawing information
from across the literature and in all birds, from penguins to passerines. Feathers are …

The first volume in this incredible series on western palearctic birds. This unique and
spectacular handbook is the most complete and comprehensive photographic guide to the …

It is poorly understood whether female morphological and behavioural traits can be used as
'signals'. In particular, experimental tests of the hypothesis that female ornaments reflect …

Some birds undergo seasonal colour change by moulting twice each year, typically
alternating between a cryptic, non‐breeding plumage and a conspicuous, breeding …

Museum specimens continue to be an invaluable resource for taxonomic, systematic, and
comparative studies, and are increasingly relied upon for novel research purposes …

Sporting a mix of blue, yellow, white, green and black, the unmistakable Blue Tit reflects the
colours of a planet affected by a burgeoning human population. Fortunately, Blue Tits are …

Despite the importance of proximate mechanisms for understanding costs and functions of
signals, relatively little is known about physiological processes underlying colorful plumage …

Background Plumage coloration is important for bird communication, most notably in sexual
signalling. Colour is often considered a good quality indicator, and the expression of …