The nominate subspecies of Eurasian Oystercatchers Haematopus ostralegus ostralegus is
the most abundant of all oystercatchers and the best studied. The main breeding and …

Knowing the correct sex of individuals is essential both for research in evolutionary ecology
and for practical conservation. Recent molecular advances have produced cheap, quick and …

Migratory connectivity describes linkages between breeding and non-breeding areas. An
ongoing challenge is tracking avian species between breeding and non-breeding areas and …

Fluctuating and disruptive selection are important mechanisms for maintaining
intrapopulation trait variation. Nonetheless, few field studies quantify selection pressures …

Migratory behavior can differ markedly amongst individuals within populations or species.
Understanding the factors influencing this variation is key to understanding how current …

Detailed knowledge on species–habitat relationships is of crucial importance for the
understanding of processes in marine ecosystems. Being top-predators, birds are important …

Eurasian Oystercatchers Haematopus ostralegus ostralegus are a classic example of
individual feeding specialization. Feeding specialization causes morphological …

Despite the potentials and contributions of guinea fowls to economic and social life in
Ghana, accurate sex identification in these birds is still a major problem. Three hundred and …

Strong winters may increase mortality in avian species, with potentially severe
consequences for populations. A period of 10 cold days during an otherwise mild winter …

Accurate sexing of birds is vital for behavioral studies but can be a real problem in the field,
especially for monomorphic species. Our goal here was to characterize the morphology of …