Flocking behaviour of Welcome Swallow

["Kurtis Lindsay" <>]

Hi all,

During the warmer months a medium sized flock of Welcome Swallows forms at the 
top of my streert in East Killara, NSW.
The birds usually number between 15-30, and spend a lot of their time perched 
together along some powerlines which hang over the road. They fly around 
hawking for insects when they aren't perched or roosting. Why is it that the 
Swallows flock around this one spot so often?

Regards,

Kurtis Lindsay
==============================www.birding-aus.org
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