In Michigan, the density average was 1 pair per . In North Dakota, 10-12 pairs were found on . 1 nest per in central Wisconsin, 1 nest per in northwestern Oregon and 1 nest per in eastern Oregon. Minimal distance between active nests is seldom less than . Distance between active nest on average was in both California and Arizona, in New York, in Kansas, in western Oregon and in eastern Oregon and in central Wisconsin. Mean distance between active nests in Illinois was . Rather small areas may be defended where hunting occurs near the nest. Typical home range sizes for Cooper's hawks are between . Home range for a Wisconsin male hawk is around during breeding and about during non-breeding. Exceptionally close active and successful nests were recorded only apart in Albuquerque and in Victoria, British Columbia. Male home ranges in Tucson (sample size 9) averaged , being smaller than in Wisconsin due to better prey concentrations (doves), however juvenile males in rural Tucson areas covered a home range of . Breeding hawks in Oshkosh, Wisconsin had an average home range of . In southwest Tennessee, a male Cooper's hawk had a home range size of and 4 females had an average range of . Slightly smaller home ranges were found for urban males in a California study, at a mean of , than in non-developed areas here, which showed a mean of . Huge male home ranges were found for breeding ones in New Mexico, at , and in north Florida, at , probably due to dispersed prey resources. Home ranges of females tend to constrict with age. An exceptionally pronounced case of this was in north Florida, where first year female home ranges went from up to about down to as little as . In central New York, the nest sites of various other woodland birds were surprisingly close to those of Cooper's hawks, though some of the nest were occupied by other birds of prey that are not regularly threatened by these hawks (though flickers, one of the birds most at threat by the hawks, were fairly dispersed away from the hawk's nests). As in most accipitrids, copulation is brief (averaging about 4.5 seconds) and frequent (at around 0.9 per hour), with total copulations averaging per season about 372.