I have a little experience of these -
You are being redirected... as well as having illustrated them for HBW
1. Woodpecker
2. Medium Ground
3. I think Small Ground, but possibly Small Tree - though Small Tree on San Cristobal salvini should not show hooded effect. On ebird there are some that look a little like yours, but beware there are several misidentified images and some that are indeed Small Tree, but clearly labelled for the wrong island
4. Large-billed Ground
5. Small Ground
6. Small Ground
7. Small Tree subsp
salvini
8. Medium Ground