migrant arrival dates.

To: Birding Aus <>
Subject: migrant arrival dates.
From: L&L Knight <>
Date: Fri, 3 Oct 2008 10:14:02 +1000
I'm no expert Andy, but the timing in bird migration is linked to the build-up of the food supply in the breeding area (flowering, insect hatching etc) as well as weather conditions during the take-off period (birds tend to leave when the weather conditions are favourable - eg stable atmosphere, tail wind etc).

Climate change affects both of these factors.

Regards, Laurie.

On 03/10/2008, at 10:00 AM, Andy Burton wrote:

There seems to be a general acceptance in the Aust / NZ birding world that global warming causes migrant birds to arrive earlier.

Why don't migrant birds arrive later?

Any ideas?


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