Global Bird Migrations Shifting With Climate


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 26 February 2019

BIRDS

Migrations Shifting With Climate

 

Western Tanager near Kennedy Meadows
Western Tanager near Kennedy Meadows
Highway 108 at Kennedy Meadows Pack Station, Map.

 

Spring migration is now earlier in European and North American birds,
University of Helsinki, February 25, 2019.

MAIN POINTS

“The greatest advances were found among short-distance migrants that winter in Europe or North America: about 1.5-2 days per decade. Long-distance migrants that winter in the tropics have also advanced the start of their migration, but only by approximately 0.6-1.2 days per decade.”

"Based on changes in median migration dates, birds have on average advanced their spring migration by a little over a week since the late 1950s."

Inter-Species Differentials
“The advances in spring migration dates are not equal across the migration season. Early migrants of a given species have advanced their migration dates more than late migrants within the species' migration season.”

Specific Regional Patterns
“Annual arrival dates of bird species were explained by local temperatures: the earlier the spring, the earlier the timing of migration and the longer the migration season. Geographical differences in climate change also explained regional differences in the advancement of spring migration.”

 

 

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