© Jack Dermid
 Virginia Opossum
Didelphis virginiana
Grizzled white above; long white hairs cover black-tipped fur below. May appear grayish or blackish. Long, naked prehensile tail. Head and throat whitish; ears large, naked, black with pinkish tips. 25-40" (645-1,017 mm); tail 10-21" (250-535 mm).
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© B. Moose Peterson
Ornate Shrew
Sorex ornatus
Grayish brown above; slightly paler below. Tail dark brown above and below, darkest at tip. 3 3/8"-4 1/4" (86-110 mm); tail 1 1/8-1 3/4" (30-44 mm).
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© Victor B. Scheffer
Trowbridge's Shrew
Sorex trowbridgii
Grayish to brownish above; slightly paler below. Long, distinctly bicolored tail, dark above; nearly white below. White feet. 4 1/4-5 1/4" (110-132 mm); tail 1 7/8-2 3/8" (48-62 mm).
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© Jan L. Wassink
Vagrant Shrew
Sorex vagrans
In summer: brownish to grayish above; grayish tinged with brown or red below. In winter: entirely grayish or blackish. Long tail uniform in color or grading to paler below. 3 3/4-4 5/8" (95-119 mm); tail 1 3/8"-2" (34-51 mm).
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© Ronn Altig
Shrew-mole
Neurotrichus gibbsii
Gray fur. Long, hairy tail is about half total head and body length. White-tipped teeth. 4-5" (103-126 mm); tail 1 1/4-1 5/8" (32-43 mm).
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© Rob Curtis
Broad-footed Mole
Scapanus latimanus
Usually brownish or grayish, seldom black. Short, hairy tail. Short hairs at base of snout. 5 1/4-7 1/2" (132-190 mm); tail 7/8-1 3/4" (21-45 mm).
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© Merlin D. Tuttle
Pallid Bat
Antrozous pallidus
Creamy to beige above; nearly white below. Big ears, separated at base. Wings and tail membrane essentially naked. 4 1/4-5 1/8" (107-130 mm); tail 1 3/8"-1 7/8" (35-49 mm).
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© Merlin D. Tuttle
Townsend's Big-eared Bat
Corynorhinus townsendii (Plecotus townsendii)
Pale gray or brown above; buff below. Wings and tail membrane naked. Enormous ears extend to middle of body when laid back; 2 large glandular lumps on nose. 3 1/2-4 1/4" (89-110 mm); tail 1 3/8"-2 1/8" (35-54 mm).
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© James F. Parnell
Big Brown Bat
Eptesicus fuscus
 Brown above, from light (in deserts) to dark (in forests), usually glossy; belly paler, with hairs dark at base; wings and tail membrane black and furless. Short, broad, rounded lobe in ear. 4 1/8-5" (106-127 mm); tail 1 5/8-2" (42-52 mm).
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