Daytime? In the canopy?

Blue Grouse...

> Lee & Lori Cain wrote:
>
> FWIW, Here's my guess:
>
> "Common Nighthawks ...are most commonly seen feeding high in the air
> during the dusk and dawn hours. Like most other goatsuckers,
> nighthawks feed on flying insects, but unlike most other caprimulgids
> (e.g., poorwills) insects are captured or "hawked" during continuous
> flight. Nighthawks are well-known for the non-vocal "booming" calls
> which are thought to be produced by air rushing through the primary
> feathers of males. These sounds are presumably used for courtship
> display and territorial advertisement."
>
> from http://www.for.gov.bc.ca/RIC/Pubs/teBioDiv/poorw/goatml20.htm
>
> in my experience what is described as a "booming" IS more like a
> bullfrog.
>
> Lee Cain
> Summer: lcain at seasurf.net
> School: lcain at astoria.k12.or.us
> Instructor, Aquatic Biology/Integrated Science
> Astoria High School
> Astoria OR 97103 503-325-3911 vm 216

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