- This is a short video of a Sooty Grouse with its chicks in the alpine in Juneau, Alaska
Hens with small juveniles may fluff body feathers, droop wings, fan tails, cluck loudly, hiss, and fly at and strike an intruder, or attempt to lead the intruder away (so-called ‘distraction display’). Intruders so attacked include a black bear (Ursus americanus; Sullivan 1979), a wolf (Canis lupus; J. Hines pers. comm.), humans, and dogs. Solid clucking (and total response) weakens with increasing age of chicks (Fig. 29). Though common in captivity, no intersibling aggression was noted in wild juveniles to about 12 d of age (Zwickel 1967a). From: Zwickel, Fred C. and James F. Bendell. 2005. Blue Grouse (Dendragapus obscurus), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/015
