Many marine predators migrate between breeding and non-breeding areas to target resources that are seasonal but spatio-temporally predictable, and so are vulnerable to climateinduced changes in prey phenology and abundance. In the Southern Ocean, small petrels are major consumers, but perturbations in the ecosystem through ocean warming are altering foodweb structure and have been linked to pol...

The Red-billed Chough Pyrrhocorax pyrrhocorax has a restricted range in Britain and has been in long-term decline since at least the early 1800s. Southwest England was a former stronghold and Cornwall was the last county in England from which it was lost as a breeding species, the last successful breeding attempt being in 1947.The reduction of suitable foraging habitat owing to changes in the m...

The relationship between bill morphology and preening behaviour was studied in 11 species of waders. On the assumption that species with long bills might be less efficient at preening than birds with short bills, the hypothesis was tested that long-billed species devoted more time to preening than short-billed species. Results showed a positive relationship between bill length and time spent pr...

Does bill pigmentation influence territorial interactions of blackbirds ? Males YES: Resident males spent more time >10m from models with brown bills than from models with yellow or orange bills and a greater proportion of time >2m from orange billed models than from yellow-billed models (Fig. 4). Resident males also displayed more quickly (but not more aggressively) to models presented with or...

Despite the publication of three independent papers that reported sightings of the Ivory-billed Woodpecker (Campephilus principalis), its preservation became a controversial topic because nobody has been able to obtain a distinct photo, which is considered the standard form of evidence for documenting birds. An analysis based on a combination of factors related to habitat and behavior suggests ...