leonard bruce
Here is the Rain Forest page of Google image search

ujd272
This website features wall murals which might be a better option for your decor: Here are some more murals: I think these are kinda' cool because they can be changed out for easy re-decorating. Combined with a paint treatment you can create your own poster/murals on your walls: Have fun! :)

Mememom
If you have photos of these animals like from a zoo, you can take them to or the negitives to any photo place and have them blown up to poster size. I did this on some of the white mountains in NH and they not only came out good, they are memories or our trip.

agf442000
Pottery barn magazines

badboy
try this site

Orgoo
They have some great mural wallpapers for kids at DesignYourWall.com. see link below.