Collaborative research by networks of amateurs has had a major role in ornithology and
conservation science and will continue to do so. It has been important in establishing the …

Many migratory birds accumulate large amounts of lipids as the prime energy source for
their long-distance flights. This fat accumulation is mostly under endogenous control …

In this paper, we present an estimate of the predation impact of the global population of
insectivorous birds based on 103 (for the most part) published studies of prey consumption …

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 …

Bird migration routes often follow detours where passages across ecological barriers are
reduced in extent. This occurs in spite of the fact that long barrier crossings are within the …

Birds usually migrate by alternating flight bouts and stopovers for refueling. The decision
when to leave a stopover place is of paramount importance for the success of migration …

Migrating animals often divide their journey into alternating phases of migration bouts and
stop** over. For investigating many questions of migration ecology it is crucial (1) to …

Many features of the migration of passerine birds are endogenously programmed and have
a strong genetic basis. At least in inexperienced migrants, the general seasonal course of …

Nearly 300 species of landbirds, whose populations total billions, migrate between the
Neotropics and North America. Many migratory populations are in steep decline, and …

Migratory birds replenishing their fuel stores have to decide when to leave their stopover site
for the next flight bout. We studied whether the decision to leave a stopover site depends on …