The Cornell Lab of Ornithology's Guide to Birds of North America: Version 3
Features all 930 birds ever seen in the US or Canada (excluding Hawaii). 2,683 colour photographs and songs for 711spp. Please check carefully that this software will be compatible with your computer's operating system.
Minimum system requirements: windows 98, Me, 2000 Pro or XP; Pentium 233 processor or equivalent; 64 MB RAM; 16x CD-ROM drive; 30 MB on hard drive; plus hardware and software required to support multimedia applications. Some features require an Internet connection.