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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

Order RodentiaGnawing Mammals

Lindsey Keiser

Order rodentia
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
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

Sciuridae squirrels
Sciuridae: Squirrels

Red squirrel tamiasciurus hudsonicus
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

Gray squirrel sciurus carolinensis
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

Fox squirrel sciurus niger
Fox SquirrelSciurus niger

  • Likes to live in a more open habitat then the gray and red squirrels

  • Called “fox” squirrel cause of reddish color

Northern flying squirrel glaucomys sabrinus
Northern Flying SquirrelGlaucomys sabrinus

  • Likes coniferous forests

  • Eats-fungi, seeds, insects, berries

Southern flying squirrel glaucomys volans
Southern Flying SquirrelGlaucomys volans

  • Likes deciduous forests

  • Doesn’t fly, but glides

  • More common then the Northern Flying Squirrel

Eastern chipmunk tamias striatus
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

Woodchuck marmota monax
WoodchuckMarmota monax

  • Also called groundhog

  • Herbivores- primarily grazers

    • Can eat up to 0.67kg of food

  • Hibernators

    • Hibernate October thru April

Castoridae beavers castor canadensis
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

Muskrat ondatra zibethicus
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

Muridae old world rats mice
Muridae: Old World Rats & Mice

Norway Rat

Rattus norvegicus

House Mouse

Mus musculus

Zapodidae jumping mice
Zapodidae: Jumping Mice

Meadow Jumping Mouse

Zapus hudsonicus

Woodland Jumping Mouse

Napeozapus insignis

Erethizontidae porcupines porcupine erethizon dorsatum
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