A single, white, elongated egg was laid per nesting ... This was a completely futile gesture as the birds still surviving, as lone individuals, were too few to reestablish the species. The passenger ...

Their distribution largely coincided with tree species that were important to them. Mainly the red oak, white oak, American chestnut and the American beech, which they relied on for mast – the ...

And since the white-tailed ptarmigan is an “indicator species” for high-elevation ecosystems — the canary in the alpine — its path toward demise could signal the complete collapse of these ecosystems ...

DESCRIPTION: Adult white-tailed ptarmigan typically grow to 30 to 34 centimeters in length and weigh 345 to 425 grams. The bird is distinguishable from other species of grouse by its perpetually white ...