This photo was rejected for quality issues. I would like to identify those issues and if possible help me to correct it.

The bird is not in sharp focus.

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https://stock.adobe.com/search?k=colorful+bird+in+tree

Hello,

Yes, the light is a bit flat, so some adjustments need to be made–more contrast.

I would crop in a bit as well.

Beautiful!
There is noise in the sky, the histogram shows no highlights and the image needs to be sharpened and in my opinion too much empty space on the right side.

Here is the photo with what I think are needed corrections.