As mentioned before, coyotes have much in common with the mesquite trees that are so common on Texas rangelands. Viewed by some as a constant problem, both have proven to be resilient and resistant to widespread efforts aimed at controlling their numbers. With both species, human thoughts have evolved from eradication during the 1940’s and the 1950’s, to control during the 1960’s and 1970’s, to management during the 1980’s and 1990’s. Biological resilience, complemented by public concerns over environmental matters, ensures that both mesquite and coyote will endure. From the rancher’s viewpoint, increases in coyote populations must be accompanied by an ever-increasing vigilance and diligence, if sheep and goat ranching is to remain at the levels observed today.