Carry‐over effects occur when processes in one season influence the success of an
individual in the following season. This phenomenon has the potential to explain a large …

Populations of migratory birds are usually considered to be limited by conditions in breeding
or wintering areas, but some might be limited by conditions encountered on migration. This …

Ecological processes are changing in response to climatic warming. Birds, in particular,
have been documented to arrive and breed earlier in spring and this has been attributed to …

Many studies have reported statistically significant associations between bird migratory
phenology and climatic variables, and, consequently, it is mostly accepted that recent shifts …

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 …

The seasonal decline of avian clutch size may result from the conflict between the
advantage of early breeding (greater offspring value) and the advantage of a delay in lay …

Commentary 1282[Auk, Vol. 122 al. 2002, Tankersley and Orvis 2003). Given that migration
may constitute the most vulnerable and unpredictable period of the annual cycle (Moore …

The phenomenon of bird migration has fascinated people from time immemorial. The
arrivals and departures of different species marked the seasons, heralding spring and …

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 …

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 …