Installing Two Thayer CDs on the Same Computer

Problem: Can I install two or more Thayer CDs on the same computer?

Solution: The short answer is, YES. The better answer is "Yes, but why?"  It might make sense to install two of the Our Birds CD-ROMs. For example, you may want Our Birds - Florida and Our Birds - Michigan if you spend a lot of time in both places. However, installing three or more state/province CD-ROMs does not make sense since, for less money, you can simply get the full Guide to Birds of North America and see all 925 species. With the full version installed, you can look at birds from any state or province (excluding Hawaii) using the "Filter" feature.

If you buy and install one of the "Our Birds" series, and later want to see all 925 species, you can purchase an upgrade of the same version for $44.95. Call 800-865-2473 to order. Be sure you know which version of the CD you have. The new license key you will receive after you upgrade will "unlock" the rest of the CD-ROM and let you see all 925 species.

It does not make sense to install the Guide to Birds of North America plus one of the "Our Birds" series on the same computer. Everything in an "Our Birds" CD-ROM is already in the Guide to Birds of North America. So you will want just the Guide to Birds of North America installed.