February on the high plains is no gentle season to be born into. Yet that is precisely when many Wyoming cows begin to calve, and ranch families reorganize their entire lives around the arrivals.

The routine is brutal and simple. Someone checks the herd every few hours, day and night, watching for a cow off by herself or a calf slow to rise. A newborn wet with birth can chill fast when the wind runs hard out of the north, so barns are bedded deep with straw and heat lamps hum in the corners.

Losses still happen, and every rancher can name the calves that did not make it. But the saves outnumber them, and there is a quiet triumph in a wobbly calf finding its feet and its mother's milk before dawn.

Ranchers who calve later, in April and May, trade the cold for softer weather but greener competition at market. Those who stick with winter say the early calves grow bigger by fall. Either way, the season demands the same thing: showing up, again and again, no matter the hour.