Avian eggshell colouration fulfills multiple adaptive functions, including egg camouflage.
The potential role of the two main eggshell pigments in oxidative stress, biliverdin and …

SUMMARY A relationship has been suggested between eggshell colour and female body
condition based on the opposing antioxidant properties of the two main eggshell pigments …

Physiological constraints on colouration have been widely reported; especially in birds,
which trade-off antioxidant responses against colourful costly signals. One female extended …

Reproduction is a critical period for birds as they have to cope with many stressful events.
One consequence of an acute exposure to stress is the release of corticosterone, the avian …

Egg camouflage may explain the adaptive significance of avian eggshell pigmentation in
ground-nesting species. Eggshell maculation (spots) is predominantly due to …

Variation in blue‐green and brown coloration of avian eggshells could be affected by
several factors, including environmental nutritional constraints. Better availability of nutrients …

Avian eggs exhibit a large variability in coloration and patterns, which are produced by blue-
green biliverdin and red-brown protoporphyrin pigments. Several hypotheses have been …

Avian egg colour has been explained as mainly serving crypsis or mimetism, although the
function of certain colours (eg blue and green) has not yet been demonstrated. We interpret …

Avian eggshell coloration may have arisen due to selection on the biological, chemical, or
physical properties of the pigments embedded within the eggshell, or due to selection on the …

Avian eggshell coloration has frequently been examined in a functional context (eg mimicry,
camouflage), but in recent years, an interest has emerged in identifying the mechanisms that …