Cool shots. I like the series of babies - the busy-ness in the frame works really well. I know this isn't a hardcore critique forum, but I think these would benefit from a boost in exposure.
Erik Williams
Olympus E3, E510
12-60 SWD, 50-200 SWD, 50 f/2 macro, EX25, FL36's and an FL50r.
I know what you mean by how they seem a little under exposeed. I usually shoot just a little under exposed. With the baby shots they where in a nest deep inside a tree so not much light and I didn't want the images to seem brighter then what the nest really was, Plus I think nose might be an issue.
Canon 60D
Canon XSi
Canon 18-55mm F3.5-5.6 IS
Canon 24-105mm f/4 L IS
Canon 55-250mm F4-5.6 IS
Canon 100mm 2.8L IS Macro
Canon 300mm F4 L IS
Canon 50mm F1.8
Tokina SD 12-24mm F/4 DX