What you need to improve is your own analysis.
The photos probably are ok for one reason, the birds are there and you probably have little time to take the shoot. Any change could mean that you loose the shoot.
I feel it's perfect shot.
But if you close your own doors and you are self-congratulatory you have reached your own peak.
Michael Clark made some questions.
What aspect of those shots do you wish to improve? You need to be very specific. Exposure? Composition? Focus accuracy? Depth of Field? Dynamic range? Color accuracy? Etc. – Michael Clark
Make a methodology to ask yourself questions.
Some technical, some composition, some narrative, some inspirational.