I really like the subdued light. Nice wet perch and the hint of water in the BG. I'd prefer a more profiled angle on the subject. Nice details in the whites!
Like it especially the finer detail on the chest, sits in the frame well and the whole scene with wet rock very expectable for this species...the only thing that catches my eye is the slight haziness of the birds eye, perhaps run a shade of darkness with the burn tool on just that area.