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Blackpoll warbler sitting on a branch in a tree

So much to eat, so little time: A rapid refueling stop on arrival in South America is key to epic migration of the Blackpoll Warbler

By Nicholas J. Bayly Linked paper: Rapid recovery by fat- and muscle-depleted Blackpoll Warblers following trans-oceanic migration is driven by time-minimization by Nicholas J. Bayly, Kenneth V. Rosenberg, D. Ryan Norris, Philip D. Taylor, and Keith A. Hobson. Ornithology. For scientists and bird watchers alike, when we think about epic migratory journeys, the Blackpoll Warbler …

Snow in the Mountains

I had no sooner posted last week’s piece about David and Elizabeth Lack in the Pyrenees when there were barn swallows everywhere in the Biros Valley. Until then I had seen no sign of the sort of visible migrations described by the Lacks, possibly because mid-September is a bit too early for that. For the …

Grandeur and Novelty

How do small land birds migrate past high mountain ranges? This is not a question that has often been asked in the Americas because most of the big mountain ranges run north-south. But in Europe, where the Alps and the Pyrenees would seem to be a formidable barrier to migration (see map below), this issue …