Thayer Birding Software and the Cornell Lab of Ornithology have joined forces to create the ultimate CD for birders. Thayer s Birds of Canada v3.9 for Macintosh computers features all 641 birds ever seen in Canada. This incredible CD includes over 1 000 color photos and songs for over 600 species. Measures H x W x L: 0.05 x 0.05 x 0.08
