Coyotes operate on a hard annual calendar that determines every aspect of their behavior: what motivates them, how they respond to calls, how many there are, and how effectively any control effort can work. The full cycle runs from December lull through February peak breeding, 62-day gestation to April pups, family group through September, dispersal in October, and back to lull. Understanding where you are on that calendar is prerequisite to selecting the right calling strategy — and to understanding why population control via hunting is essentially impossible no matter how many coyotes are removed.
Hunter knows the annual calendar cold: December is the pre-breeding lull (7-10 days of near-zero response, ~60 days before peak estrus). January marks early breeding with territorial aggression rising. February 15 is peak breeding. Gestation is 62 days — pups arrive mid-April. Family group stays together through summer with pups learning. September-October is family bust-up: pups disperse as yearlings seeking their own territories — response rates surge because dispersing pups are curious, unconditioned, and urgently need to establish food resources. Hunter calibrates calling sequences, expected response rates, and stand durations to match the phase — short aggressive territorial calls in breeding season, prey distress + pup sounds in fall, patience in December. Knows that removing 75% of a local coyote population results in full repopulation within one breeding season due to compensatory reproduction.
The standard coyote calling doctrine assumes coyotes will circle to wind before committing. During breeding season, territorial pairs charge straight at the intrusion without circling. The downwind interception geometry that works all year fails in January–February.
Remove 75% of coyotes from a territory and surviving animals produce larger litters that same year, restoring population to baseline within 12 months. This is a documented biological response. Annual cull efforts (one-season intensive removal) produce zero sustained population reduction.