[mou] interesting article [swifts' flight]

[tapaculo at halcyon.ws]

Jim Ryan wrote:
"... There is a mention of the fact that swifts sleep while they are flying...Does
  anyone know do that all the time and if they also roost?"

I assume our swifts land each night but, according to Borrow and Demey, the
old world Common Swift is "presumed to remain on the wing, even for roosting,
during [its] entire sub-Saharan stay", so more than 6 months...

Steve Greenfield
Minneapolis
tapaculo at halcyon.ws