I wonder why these photos were rejected

I am trying to learn how to contribute to Adobe Stock. I took these 2 photos of a characteristic Australian scene that presented itself, and they look sharp and well composed to me. I would be happy to use them myself. I searched for Kookaburra on clothes line and got 52 results. Mine were not too similar to the others.
Can anyone suggest what is wrong with these photos? (It only seems to allow me to attach one photo, but I submitted one in portrait mode as well)
