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Big sagittal crest on skull
Virginia Opossum Didelphimorphia Didelphidae Didelphis virginiana

Largest shrew (Big body)
Short tail (less than half of body length)
Southern Short-tailed Shrew Eulipotyphla Soricidae Blarina carolinensis

Small body
Short tail (less than half of body length)
Least Shrew Eulipotyphla Soricidae Cryptotis parva

Long pointed nose
Long tail (Tail at least half its body length)
Southeastern Shrew Eulipotyphla Soricidae Sorex longirostris
what is unique about shrew skulls?
No zygomatic arch

Skull: Very thing zygomatic arch
Pelet: Nape where hairs go either direction
Eastern Mole Eulipotyphla Talpidae Scalopus aquaticus

Skull: homodont detention, long narrow rostrum
Nine-banded Armadillo Cingulata Dasypodidae Dasypus novemcinctus

Smaller pelt and more gray (less red)
Skull: Projection above the orbit makes a lobe
Eastern Cottontail Lagomorpha Leporidae Sylvilagus floridanus

Larger pelt, rusty reds, and more black
Skull: doesnt have lobe and no separation of the process
Swamp Rabbit Lagomorpha Leporidae Sylvilagus aquaticus
Rabbits vs rodent skull?
rabbits have the second row of upper incisor teeth