Thread: First Swallows
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Old April 5th 07, 05:21 AM posted to uk.sci.weather
Weatherlawyer Weatherlawyer is offline
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Default First Swallows
On Apr 4, 10:00 pm, Andy H wrote:
Hi,

I saw my first pair of swallows for the year, this afternoon at about
17:00hrs in Blandford Forum, Dorset.

How do they know?

Do they wait for suitable weather patterns to speed them on their way?


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