[Tweeters] migrants

[Michael Price via Tweeters]

Hi tweets

In Vancouver BC, having birds linger like this is sometimes a result of
cold wet weather clogging the mountain passes with deep snow. A couple of
indicator species of this are Grey-crowned Rosy Finches at sea level, and
Mountain Bluebirds. According to a biologist who worked a lot with mountain
birds (sorry, name forgotten) said the birds at sea level will fly up
daily, check out the conditions up high and if the passes are still
clogged, they'll just come back to sea level, rinse and repeat until they
can get through.

best wishes, m
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