Content with tag body condition .

Nocturnal birds could communicate through the fluorescence of their feathers

Many nocturnal animals, including invertebrates such as scorpions and a variety of vertebrate species, including toadlets, flying squirrels, owls, and nightjars, emit bright fluorescence under ultraviolet light. However, the ecological significance of this unique coloration so attached to nocturnality remains obscure. An intensively studied population of migratory red-necked nightjars (Caprimulgus ruficollis) was used to investigate inter-individual variation in porphyrin-based pink...

Birds present worse body conditions in more urbanized areas

Human landscape transformation, especially urbanization, strongly affects ecosystems worldwide. Both urban stressors and parasites have negative effects on organism health, however the potential synergy between those factors has been poorly investigated. The body condition (i.e. body mass after controlling for wing chord) of 2043 house sparrows (Passer domesticus; adults and yearlings) captured in 45 localities along an urbanization gradient in relation to Plasmodium, Haemoproteus and...

Light pollution and seabird fledglings

One of the most critical phases in the life of petrels is at fledging when young birds pass from parental dependence on land to an independent life at sea. To mitigate mortality at this time, rescue programs are implemented near breeding sites around the world, especially for birds grounded by artificial lights. This study evaluated the plumage and body condition of short-tailed shearwater fledglings captured at colonies just before departure in comparison to fledglings washed up on beaches...