hi, here's my suggestions :) for the first one, what misha said :) the second one looks ok but the left top and bottom corner distract me...could be i'm easily distracted...lol the third, my fave, looks great but the distraction is the bit of green to the right mid way down. last one's ok... hope this helps. you have exceptional bird images :)

Pictures appear to me, I shoot them.   Elliot Erwitt