Three hundred eighty-eight stations were surveyed for siren-elicited responses from coyotes (Canis latrans) and dogs (Canis familaris). Responses were received from coyotes at 15 of 388 station soundings (3.9%) whereas dogs were heard at 14 of 388 station soundings (3.6%). November had the highest rate for coyotes (5.8%) and February had the highest rate for dogs (5.3%). Two indices of relative abundance were determined by dividing the average number of individuals responding and average number of responses from 3 soundings at each station by the estimated area covered at those stations in 1 sounding. To correct for those coyotes that do not respond to the siren, this value was then multiplied by 2. Indices of coyote abundance so determined were 0.017 individual responses/km2 and 0.010 responses/km2, whereas indices of dog abundance were 0.011 individual responses/km2 and 0.009 responses/km2.
