[thinkmore]

it does seem to taper quickly right after the vent though, if its possible, can you get a better shot?

Yes, also true... Well, I'm feeling a bit less stupid, since it does seem to be hard to tell. Our camera only seems to work outdoors in bright sunshine for vent pics, so will have to wait for the appropriate conditions to try for a better shot.

At least we don't have to keep changing Rook's name every time we determine a new gender!