Hi Joe,
I agree with Bobo (spooky, second time I said that in 1/2 hour) - I'm not sure wildlife and birds can really have a 'style' as such, beyond consistently shooting high or low key, which will soon get limiting and potentially frustrate nature lovers because they cannot see some detail they are interested in. So that only leaves imposing a 'trademark' border, as many here do, for all their shots as a means of displaying a style.
These are four quite different shots, if I may;
#1 looks to me like it needs a little anti-clockwise rotation, I think it is down on the right. It might benefit from shaving a fraction off the left side compositionally, but I like the groupings of birds. With shots like this, I have occasionally 'thinned out' grass stems if I felt there were too many (not saying there here, just mentioning a technique I use).
#2 no suggestions, you nailed it
#3 ditto - much better than most of mine are, was it as close as the 165mm focal length suggests?
#4 what Bobo said, plus I'd have trimmed a tad off the right hand side to de-centre it
Hope that's helpful, but do bear in mind that 'stylish' is the last word anyone would use to describe me