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The northern short-tailed shrew (Blarina brevicauda) is the largest shrew in the genus Blarina, [3] and occurs in the northeastern region of North America. [4] It is a semifossorial, highly active, and voracious insectivore and is present in a variety of habitats like broadleaved and pine forests among shrubs and hedges as well as grassy river banks. [5]
Nanosaurus is known from material from all parts of the body, including two good skeletons, although the skull is still poorly known. [15] It was a small animal, with specimens previously assigned to Drinker and Othnielosaurus measuring 2–2.2 metres (6.6–7.2 ft) long and weighing 20–30 kilograms (44–66 lb). [16]
The skulls of ornithomimosaurs were small, with large eyes, above relatively long and slender necks. The most basal members of the taxon (such as Pelecanimimus and Harpymimus) had a jaw with small teeth, while the later and more derived species had a toothless beak. [11] The fore limbs ("arms") were long and slender and bore powerful claws.
Skulls of a long-tailed weasel (top), a stoat (bottom left) and least weasel (bottom right), as illustrated in Merriam's Synopsis of the Weasels of North America. The long-tailed weasel is the product of a process begun 5–7 million years ago, when northern forests were replaced by open grassland, thus prompting an explosive evolution of small, burrowing rodents.
The shrew usually has 30 teeth, but the 4th upper intermediate tooth is very small (rudimentary), and is absent in some individuals. [6] Near the mouth grow a dense array of short whiskers, which the shrew actively uses to search for prey, especially in the night. [7] Dimorphism in body features between males and females is absent. [10]
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All shrews are tiny, most no larger than a mouse. The largest species is the Asian house shrew (Suncus murinus) of tropical Asia, which is about 15 cm (6 in) long and weighs around 100 g (3 + 1 ⁄ 2 oz) [2] The Etruscan shrew (Suncus etruscus), at about 3.5 cm (1 + 3 ⁄ 8 in) and 1.8 grams (28 grains), is the smallest known living terrestrial mammal.
DNA testing helped identify the man 55 years ... Animals. Business. Fitness. Food. Games. Health. Home & Garden ... A skull discovered by two teens playing in a rockpile 55 years ago has now been ...