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This is a list of archaeological sites on the National Register of Historic Places in Illinois. Historic sites in the United States qualify to be listed on the National Register of Historic Places by passing one or more of four different criteria; Criterion D permits the inclusion of proven and potential archaeological sites . [ 1 ]
Eastern meadow voles are active year-round [8] [9] and day or night, with no clear 24-hour rhythm in many areas. [10] Most changes in activity are imposed by season, habitat, cover, temperature, and other factors. Eastern meadow voles have to eat frequently, and their active periods (every two to three hours) are associated with food digestion.
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The western meadow vole (Microtus drummondii) is a species of North American vole found in western North America, the midwestern United States, western Ontario, Canada, and formerly in Mexico. It was previously considered conspecific with the eastern meadow vole ( M. pennsylvanicus ), but genetic studies indicate that it is a distinct species.
A burrow is a hole or tunnel excavated into the ground by an animal to construct a space suitable for habitation or temporary refuge, or as a byproduct of locomotion. Burrows provide a form of shelter against predation and exposure to the elements, and can be found in nearly every biome and among various biological interactions .
Burrowing owls will also nest in shallow, underground, man-made structures that have easy access to the surface. During the nesting season, burrowing owls will collect a wide variety of materials to line their nest, some of which are left around the entrance to the burrow. The most common material is mammal dung, usually from cattle.
The nest chamber may be about twenty inches to three feet (51–91 cm) below ground surface. It is about 16 inches (41 cm) wide and 14 inches (36 cm) high. There are typically two burrow openings or holes. One is the main entrance, the other a spy hole. Description of the length of the burrow often includes side galleries.
A modern view of a medieval pillow mound at Stoke Poges, England. The most characteristic structure of the "cony-garth" ("rabbit-yard") [1] is the pillow mound.These were "pillow-like", oblong mounds with flat tops, frequently described as being "cigar-shaped", and sometimes arranged like the letter E or into more extensive, interconnected rows.