With the available light this an excellent image out of the cam Len. If any improvements could be made then it would be the usual fine tuning in photoshop. The exposure is really good, as the ladies have said you did well not to lose any detail.
Well done buddy.
The crop is a good one.
If you have photoshop then i would be tempted to muste the vibrancy of the green a little and maybe and add a tiny bit more oomph to the bird. This is not doable (made up word!) straight out of the cam so you really have done a fine job mate.