These are terrific, Natalie.
I'd describe the first as a "formal portrait," and it's an outstanding one, well composed and exposed, and nicely sharp (as all 4 of these are).
The second is my favorite; I like photos of birds in unexpected postures. As with #1, it's top-notch in all aspects.
Number 3 is an excellent shot of a GBH in flight - something I've never achieved. Well done.
And number 4 makes me wonder - is the bird startled, upset or angry at something?
Really nice set of images, Natalie.