First Impression - the most important one: Ok you already know from my previous comments i don't think this meets the challenge, but I still think it is a lovely shot.
Composition: The bird is nicely framed here ..
Subject: did not meet the challenge ..
Technical (Colour and light): natual works well here. nice and sharp and a good DOF unless you want the window frame to be used in the shot.
To grow its vote?: Meet the challenge :) ...
Summary: Go for it .. your portfolio really shows you are doing well ... I like out of the box pics :)
If you've got any questions about this critique, please feel free to contact me via the PM system.
Sorry but this doesn´t meet the challenge as far as I am concerned, where is the window? Is it that blurred blob behind the bird? No way of telling. Anyway, just wanted to explain why I gave this a 1.
Kind of hard to tell it is taken through a window, I personally am looking for a window to be framing the object as I think this is what the challenge details were about, I will give you the benefit of the doubt. Good focus and depth of field, keeping the background at just enough blur to add a little color and character.