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A drey is the nest of a tree squirrel, flying squirrel or ringtail possum. [1] Dreys are usually built of twigs, dry leaves, and grass, and typically assembled in the forks of a tall tree . [ 2 ] They are sometimes referred to as "drey nests" to distinguish them from squirrel "cavity nests" (also termed "dens").
Ponderosa pine seldom have cavities big enough for Abert's squirrels. In central Arizona nest trees ranged from 12 to 41 inches d.b.h. and were 20 to 110 feet (6.1 to 33.5 m) tall. [5] In another Arizona study, nest trees ranged from 11.6 to 36.6 inches (29 to 93 centimetres) d.b.h. Most nests are placed in the upper third of the tree crown. [27]
A western gray squirrel eating pine seeds from a pine cone. Squirrel nests are called dreys and can be seen in trees, built from sticks and leaves wrapped with long strands of grass. There are two stick nest types made by the western gray squirrel: the first is a large, round, covered shelter nest for winter use, birthing, and rearing young.
Northern flying squirrels generally nest in holes in trees, preferring large-diameter trunks and dead trees, and will also build outside leaf nests called dreys and will also nest underground. Tree cavities created by woodpeckers as suitable nest sites tend to be more abundant in old-growth forests, and so do the squirrels, though harvested ...
The squirrel makes a drey (nest) out of twigs in a branch-fork, forming a domed structure about 25–30 cm (9.8–11.8 in) in diameter. This is lined with moss, leaves, grass and bark. Tree hollows and woodpecker holes are also used. The red squirrel is a solitary animal and is shy and reluctant to share food with others.
The Douglas squirrel (Tamiasciurus douglasii) is a pine squirrel found in western North America, from the Pacific Northwest (including the northwestern coastal states of the United States as well as the southwestern coast of British Columbia in Canada) to central California, with an isolated subspecies in northern Baja California, Mexico.
The round-tailed ground squirrel (Xerospermophilus tereticaudus), known as "Ardillón cola redonda" in Spanish, live in the desert of the Southwestern United States and Northwestern Mexico. They are called " ground squirrels " because they burrow in loose soil, often under mesquite trees and creosote bushes .
Actual tree hollows can be created artificially by cutting into trees with chainsaws and partly covering the resulting hollows with timber faceplates. [11] [12] These are readily used by arboreal animals including mammals and birds. [11] [12] Compared to nest boxes, they last longer and give better protection from external temperatures. [11]