Since Jao was with us for the day, and since we were trapped in a cold snap--the temperature scarcely getting into the eighties--and since the Desert Museum can be very much like a Sonoran desert when it is hot, we decided to spend a few hours there, and a delightful few hours they were, too. Jao loves the biology more than the botany of the Museum, even when the animals are mineral. The Bighorn sheep family has been in a family way, so their generations are showing. One of the advantages of the river otter and other water exhibits is that there is a small ice cream shop just around the corner. We saw Mexican Gray wolves, a pacing bear, and almost saw a young Mountain Lion taking a mid-day nap. Not all of the prairie dogs were dozing: some were on sentinel duty. Sentinels were everywhere. The humming bird house, or aviary, particularly fascinated Jao, not because of the birds, but because the entry and exit was secured with a curtain wall of lightweight plastic