Date: 12/30/18 12:55 pm
From: Bob Archer <rabican1...>
Subject: [obol] Barn Swallow migrations
Hi:

We have had talks before about Barn Swallows up here in winter. THe
attached study seems to show different populations migrate different
distances south. Then as Dave mentions, these might be South American
birds migrating north. These could be birds from northern Canada or
Alaska. As Barn Swallows expand their breeding territory, would not be
surprised to see more during the winter.

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0129340

https://www.audubon.org/news/the-barn-swallow-slowly-conquering-world

Bob Archer
Nonmigratory in PDX

 
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