Climate warming challenges animals to advance their timing of reproduction [1], but many
animals appear to be unable to advance at the same rate as their food species [2, 3]. As a …

Shifts in reproductive phenology due to climate change have been well documented in
many species but how, within the same species, other annual cycle stages (eg moult …

Body composition of birds is often used to assess in part the “condition” of individuals in the
context of their life history and ecology. We describe contemporary non-destructive (non …

Arctic amplification, the accelerated climate warming in the polar regions, is causing a more
rapid advancement of the onset of spring in the Arctic than in temperate regions …

Performing migratory journeys comes with energetic costs, which have to be compensated
within the annual cycle. An assessment of how and when such compensation occurs is …

Breeding output of geese, measured as the proportion of juveniles in autumn or winter
flocks, is lower in years with a late onset of spring in some species, but higher in at least one …

Intermittent breeding is an important tactic in long‐lived species that trade off survival and
reproduction to maximize lifetime reproductive success. When breeding conditions are …

Rapid climate warming is driving organisms to advance timing of reproduction with earlier
springs, but the rate of advancement shows large variation, even among populations of the …

Local weather conditions may be used as environmental cues by animals to optimize their
breeding behaviour, and could be affected by climate change. We measured associations …

The postnatal growth period is a crucial life stage, with potential lifelong effects on an
animal's fitness. How fast animals grow depends on their life‐history strategy and rearing …