Ruffed grouse populations, which tend to rise and fall on a 10-year cycle, are surveyed by counting the number of male ruffed grouse heard drumming on established routes throughout the state’s ...

Ruffed grouse populations, which tend to rise and fall on a 10-year cycle, are surveyed by counting the number of male ruffed grouse heard drumming on established routes throughout the state’s ...

The ruffed grouse has been Pennsylvania's state ... During mating season, which is March and April, male grouse attract females by drumming. With their tail fanned, the male stands on a large ...

From singing American robins to the rat-a-tats of various objects by woodpeckers, to trumpeting trumpeter swans and much more ...

Greater sage grouse are sexually dimorphic, meaning the male and female look different. Females are small and football-shaped, with a black belly and white-speckled feathers, while males resemble ...