Bird Watching: An encounter with Golden Eagles !, 1 by Grasmussen

Grasmussen wrote:
Quoting from A BIRDER'S GUIDE TO SOUTHEASTERN ARIZONA
"Stretching 100 miles on a north-south axis and ranging from 15 to 25 miles in width, the 4000-foot high Sulphur Springs Valley has earned the reputation as the best winter raptor location in Southeastern Arizona. Up to 14 species of birds of prey find a cold-season niche in the broad grasslands....."

I was very disappointed to find 97% of the raptors where Red-tailed Hawks. I had expected a much greater variety. But there were Red-tailed in every imaginable color phase.