There is a group of moths called sphinx moths which are often
mistaken for hummingbirds. There's even one called a hummingbird
moth.

The one you've descriped sounds like White-lined Sphinx Moth
which is turning up at higher than average frequencies this
year. See:
http://www.birds-n-garden.com/white-lined_sphinx_moth.html

--
Mike Patterson
Astoria, OR
celata at pacifier.com

Half-a-bee, philosophically must ipso-facto half not-be.
But half the bee, has got to bee Vis-a-vis its entity...
d'you see?
But can a bee be said to be or not to be an entire bee
When half the bee is not a bee due to some ancient injury?
-Monty Python

http://www.pacifier.com/~mpatters/bird/bird.html