I've only got the JPEG to work off, but with your 3rd shot I cut-&-pasted it into the freeware XnView (Ctrl-Shift-V) and bought up the histogram in Levels (L). The max. White Point seems to be only 230 out of 255. Try setting the WP to 230. It will brighten up this image without having much effect on the deep shadows (unlike adjusting Brightness) and didn't seem to blow any highlights.
And I think the WP in the bird shot could safely be adjusted to 241-248. It will blow the extreme white on one of the floating leaves (causing "Blinkies" on the screen of your post-processing software if you have that option enabled), but you're not really losing any visually interesting image info.
Do you shot in raw?
Dan.
Last edited by dosdan; 09-16-2011 at 02:35 PM.