Altitudinal migration by birds

What is it about?

Altitudinal migrantion by birs is a review of the literature and a comprehensive list of bird species that perform seasonal altitudinal movements from breeding areas to non-breeding or wintering areas at different elevations.

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Why is it important?

Our findings show that ~10% of the ~10,000 extant species of birds are altitudinal migrants. We also found that most species of altitudinal migrants were invertivores rather than frugivores or nectarivores. This general pattern held true for all zoogeographic realms except the Neotropics, where nectarivores and frugivores predominated among altitudinal migrants. Overall, we found no prevalence of any specific foraging guild among altitudinal migrants across zoogeographic regions.