The male is a rich chestnut color, with a dark spatulate bill. The female is similar to a female Blue-winged Teal, but richer in color. Larger than a Green-winged teal, especially in the body. Lacks the eye stripe and buffy rump patch of the Green-winged teal.
The best spot to look for Cinnamon Teal are the National Wildlife Refuges that are managed for waterfowl. San Bernard NWR is supposed to be one of the best spots to find them in Texas. Also check Anahuac NWR, Attwater NWR, and Brazoria NWR
A breeding range map is available form the Breeding Bird Survey
A winter range map is available from the Christmas Bird Count