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 …

Long distance migrants are declining more rapidly than residents, with birds that breed in
Europe and winter in tropical Africa providing particularly clear examples. Causal …

Life of many organisms flows as a sequence of annual cycles. Timing of cyclical events is
shaped by natural selection also via the domino effects that any life history stage has on the …

The effects of environmental perturbations or stressors on individual states can be carried
over to subsequent life stages and ultimately affect survival and reproduction. The …

Microbiomes can be considered as 'second genomes' for the host, and can deeply affect its
physiology, behaviour and fitness. We investigated the cloacal microbiomes (CMs) of adult …

Tropical bird species are characterized by a comparatively slow pace of life, being
predictably different from their temperate zone counterparts in their investments in growth …

Molt and ecdysis are costly activities crucial to several animals. Most birds completely molt
their plumage once per year. The diverse energy and aerodynamic costs of molt are …

Feathers are used for flight, and any damage to feathers impairs efficient escape from
predators. Because individuals can either rapidly produce feathers of poor quality or slowly …

Parasites are major effectors of natural selection and also play a role in sexual selection
processes. Haemosporidian blood parasites are common in vertebrates and have been …

In birds, concentrations of testosterone (T) and corticosterone (Cort) are closely connected
with many morphological, behavioral, and other physiological traits, including reproduction …