ok, can't seem to figure out how to post pics. Anyway, seems like there is lots (hundreds?), I pulled my birdsnest out the other day and there were about 4 or 5 on it. They are about 1/4" long, curved, brown, and wiggly.
Edit: yeah, they look like the <u>Amphipods</u>
Edit: I figured they were harmless, just concerned because there seems to be so many.