Squirrels are a familiar sight in many backyards and parks. Their energetic behavior frequently leads people to wonder about their homes, particularly if these agile creatures build nests high in the trees. These arboreal rodents do indeed construct specific shelters within the tree canopy, which serve various important functions throughout their lives.
The Squirrel Drey
Squirrels commonly build a type of nest known as a drey, which is a structure found high in tree branches. These dreys often appear as a somewhat messy, spherical collection of leaves and twigs. Dreys are usually situated in the forks of tree branches or nestled close to the main trunk, providing a stable foundation and some concealment.
The construction of a drey involves several layers. The outer layer consists of sturdy twigs and branches, forming a protective shell. Inside this framework, squirrels weave together softer materials such as leaves, moss, and bark strips. This inner lining creates a warm, insulated space.
Beyond the Drey: Other Squirrel Habitats
While dreys are a common sight, squirrels also utilize other types of shelters within their environment. Tree cavities, which are natural holes or hollows found within tree trunks or large branches, are often preferred over dreys. These cavities offer superior protection from predators and harsh weather due to their enclosed nature. Squirrels often line these natural hollows with soft materials, similar to the inside of a drey, to create a comfortable living space.
Ground burrows are another type of habitat, primarily used by ground squirrel species, but tree squirrels may also temporarily use them for stashing food or seeking quick refuge. Additionally, squirrels can sometimes adapt to human-made structures, seeking shelter in attics, sheds, or outbuildings. This demonstrates their adaptability to various environments when natural options are limited or more secure alternatives are available.
Purpose of Squirrel Nests and Homes
Squirrels construct or inhabit these various structures for several important reasons. One primary purpose is to provide shelter from the elements, protecting them from rain, snow, wind, and extreme temperatures. These homes offer a safe haven, allowing squirrels to conserve energy when conditions are unfavorable.
Another significant function of these nests and cavities is protection from predators. High-up dreys and concealed tree cavities offer a secure retreat from ground-based predators like foxes and cats, as well as aerial threats such as hawks and owls. These safe locations are also where female squirrels raise their young, providing a warm and secure nursery away from dangers. Squirrels may maintain multiple homes, using different locations for various purposes or as backup shelters if one becomes compromised.
Spotting Squirrel Nests and Signs
Identifying squirrel dreys in trees can be relatively straightforward, especially during the winter months when deciduous trees have shed their leaves. Look for large, spherical masses of twigs and leaves, distinct from typical bird nests which are generally smaller and more finely woven. Dreys are often visible high in the canopy, sometimes appearing quite disheveled compared to the surrounding branches.
Beyond the nests themselves, other signs can indicate the presence of squirrels in an area. Chewed nuts or seed casings found at the base of trees or on branches are a common indicator of their feeding activity. Gnawed wood on tree bark or even on human structures can suggest their presence. Additionally, the distinct chattering or scolding sounds made by squirrels are often a reliable sign of their activity nearby.