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Order Rodentia Gnawing Mammals. Lindsey Keiser. Order Rodentia. Largest order of mammals Over 2000 living species placed in 30 families Over 40% of mammalian species belong to this order. Rodentia Skulls. Only have one pair of upper and lower incisors

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Order Rodentia Gnawing Mammals


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    1. Order RodentiaGnawing Mammals Lindsey Keiser

    2. Order Rodentia • Largest order of mammals • Over 2000 living species placed in 30 families • Over 40% of mammalian species belong to this order

    3. Rodentia Skulls • Only have one pair of upper and lower incisors • Each incisor is rootless, growing continuously • Have enamel on the anterior and lateral surface • Has a gap (diastema) between incisors and premolars

    4. Sciuridae: Squirrels

    5. Red SquirrelTamiasciurus hudsonicus • Likes to nest in evergreen trees • Eats-insects, seeds, bark, nuts, fruits • Will cut green pine cones from trees and store them in piles called middens • Can be very loud and chatters , growls, and screeches

    6. Gray SquirrelSciurus carolinensis • Prefers a woodland habitat • Eats-mainly tree seeds • In winter will use scatter hoarding to preserve food • Can leap more then 20 feet

    7. Fox SquirrelSciurus niger • Likes to live in a more open habitat then the gray and red squirrels • Called “fox” squirrel cause of reddish color

    8. Northern Flying SquirrelGlaucomys sabrinus • Likes coniferous forests • Eats-fungi, seeds, insects, berries

    9. Southern Flying SquirrelGlaucomys volans • Likes deciduous forests • Doesn’t fly, but glides • More common then the Northern Flying Squirrel

    10. Eastern ChipmunkTamias striatus • Have cheek pouches where they store food • Have strips on their faces • There are 22 species of chipmunks • 1 in east ,21 in west

    11. WoodchuckMarmota monax • Also called groundhog • Herbivores- primarily grazers • Can eat up to 0.67kg of food • Hibernators • Hibernate October thru April

    12. CastoridaeBeaversCastor canadensis • Is our largest rodent • Adults can be up to 4 feet long and weigh over 60lbs • When it slaps its tail it’s a signal of danger or its to warn away predators • It can remain under water for as long as 15 minutes

    13. Cricetidae: Native Rats, Mice & Voles

    14. MuskratOndatra zibethicus • Mainly nocturnal • Feed on aquatic plants • Scent mark their territories, this is where they get their name • Scaly, hairless tail that is different from a beavers

    15. Muridae: Old World Rats & Mice Norway Rat Rattus norvegicus House Mouse Mus musculus

    16. Zapodidae: Jumping Mice Meadow Jumping Mouse Zapus hudsonicus Woodland Jumping Mouse Napeozapus insignis

    17. Erethizontidae: PorcupinesPorcupineErethizon dorsatum • May have up to 30,000 quills • Quills-hairs with barbed tips • Uses quills for defense, can not shoot them • No real predators, except the fisher • In the winter it will eat the inner bark of the trees • In summer its diet will change