Its great to see some imagination Jon, but shots like these are always little 'marmite'!
For me personally, the first nearly works - I like the spotlight effect a lot but unfortunately the shooting angle lets you down - easy to say in hindsight but you needed to be further to your left for it to have worked.
For the silhouettes, the second with the Nutty going down is far stronger as the open beak is nice and the downwards descent clearly show the species.
As already mentioned, the last is a bit soft, looks like focus hit in front of the bird going by the bark.
Glad you're looking for something other that the normal shots, keep at it - makes thing more interesting
Mike