Order Chiroptera
• only true flying mammals
• date to Eocene (50 mya)
• worldwide
– 17 families
– 170 genera
– 850 species
• suborders
– Megachiroptera-flying foxes of tropics
– Microchiroptera-worldwide
Pennsylvania’s Bats
• all are Verspertilionids, ‘evening’ bats
• all are insectivorous, hence migrate or hibernate
• 11 species belonging to 6 genera
Little Brown Myotis
Myotis lucifugus
Little Brown Myotis
Just the facts:
• PA’s most common bat
• 6-9 grams
• may live to 25 years
• favors ponds and streams for foraging
• forages at about 13 mph, 3-6 m above ground
• mate in early autumn; fertilization in spring upon rousing; 5060 day gestation
• move to maternity colonies of hundreds
• born after 30 minute labor in late May weighing1.5 grams
• reaches sexual maturity at 8 mos.
Northern Myotis
Myotis septontrionalis
Formerly Keen’s Myotis, Myotis keenii
Indiana Myotis/Pink-faced Bat
Myotis sodalis
Federally Endangered
Distinctive calcar
Small-footed Myotis
Myotis leibii
PA Threatened
Silver-haired Bat
Lasionycteris noctivagans
Eastern Pipistrelle
Pipistrellus subflavus
Big Brown Bat
Eptesicus fuscus
Red Bat
Lasiurus borealis
Hoary Bat
Lasiurus cinereus
Evening Bat
Nycticeius humeralis
Vampire Bat
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