Jayne Netley Mayhew's Cross Stitch Animal Collection is filled with amazing, realistic images of wildlife. Each section begins with a large collage of related animals.
There are also some smaller images to stitch. I love the colors and shading of this hermit crab...and I had hermit crabs as a kid which seems like enough reason to stitch one.
The one pattern in the book that I'm most drawn to is this shoal of mackerel. I don't know why, or what I'd do with it if I did stitch it, but I want to.