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Photographic guide to bats

  1. 1. By The Save Lucy Campaign
  2. 2.  Slide show is intended for bat rehabilitators and bat enthusiasts. Please feel free to distribute, but be nice and credit the source.  This is a work in progress. Species will be added as photos are procured.  In a very few instances, photo credit is unknown. If we have used a photo that belongs to you or your agency, please let us know who to credit. Thanks in advance!  All other photos belong to Rich Sturges and/or The Save Lucy Campaign.
  3. 3. FACE Muzzle Broad? Narrow? Bald? Furred?
  4. 4. EARS Shape Narrow? Rounded? Length Short? Long?
  5. 5. Tragus The narrow element in the ear Important in telling Myotis spp. apart
  6. 6. BODY Size Weigh! Measure nose to tail Coat Color Some have banded fur Color varies with age and among individuals Length Furred tail membrane? Furred wrists?
  7. 7. SIDE VIEW Color of dorsal vs. ventral fur Color of wing, tail membrane
  8. 8. FOREARM Measure!! For the love of all that is holy, measure the forearm!!! Over 40mm and brown = big brown bat
  9. 9. FOOT If forearm is less than 40mm, might need to measure foot
  10. 10. ToeHairs For brown bats with forearms under 40mm, might need to examine toe hairs Copious? Long? Usually need magnification and very good light to see
  11. 11. Keel For brown bats with forearms under 40mm, might need to look at calcar Yes!! No!!
  12. 12. Bats!!
  13. 13.  Short, rounded ears  Broad, bald muzzle  Forearm OVER 41 mm  16—20+ grams; 14 inch wingspan  Nonmigratory  Uses buildings summer and winter  Also uses caves and mines for hibernation  Beetle eater  2 young per year born late May early June  Lifespan 15—18 years
  14. 14.  Long, narrow ears  Sharp, furred/whiskered muzzle  Forearm 34—41 mm  7—9 grams; 9inch wingspan  Highly variable in color and body size.  Often uses buildings or barns in summer  Migrates to caves in winter—may move 200+ miles to reach appropriate hibernacula  Forms large colonies  May roost with other myotis species  One pup per year  Lifespan 30+ years PAGameCommission
  15. 15. Big Brown Bat Little Brown Bat
  16. 16.  ENDANGERED  Uses building roosts, but also associated with old trees with sloughing bark  Is known to roost with Little Brown Bats  Same size and very similar appearance to Little Brown Bat  Nose is slightly shorter; face has a pinkish cast; keeled calcar; sparse, short toe hairs; small foot  Migrates to caves for winter; recovered over 200 miles from banding sites Courtesy: John Chenger, Bat Conservation & Management, Inc. Courtesy: NY DEC Courtesy:JohnChenger,Bat Conservation& Management,Inc.
  17. 17. Photo by Adam Mann, Environmental Solutions and Innovations Little Brown Bat Indiana Bat
  18. 18.  Proposed for ESA listing  Extremely long, narrow ears extend 4mm past nose when pushed forward  Narrow, sparsely furred muzzle  Horizontally striated tail membrane is diagnostic  Forearm 32—39 mm  7—9 grams; 9 inch wingspan  Very similar in appearance to Little Brown Bats  May roost with other myotis species or in small colonies of conspecifics.  Found in deck umbrellas, tree hollows, loose siding  Thought to migrate to caves for winter BUT new information suggests this may not be true
  19. 19. Little Brown Bat Northern Long Ear Bat B. Crokus
  20. 20.  ENDANGERED  Somewhat larger than other Myotis species  6—13 g; 40—46mm forearm  Woolly gray or russet fur  Hair is solid color base to tip  Membrane attaches at ankle; claws are notched  Uses caves year round, but moves to three distinct cave roosts: hibernation, nursery, summer
  21. 21.  Gray to bright brown fur  5—8 g ; forearm 36—40mm  10 in wingspan  Belly fur markedly lighter than dorsal fur  Pinkish face, wooly fur  Southern coastal areas; Great Dismal Swamp  Not common Smithsonian Museum of Natural HIstory
  22. 22.  Distinctive black mask  Smallest bat in region  3—5g; wingspan 8.5—9.5 in  Forearm 30—36mm  Foot is only 8mm; keeled calcar  Associated with scree and talus slopes  Western, mountainous areas  Rare across range  Dependent on puddles and road ruts for drinking water
  23. 23.  Small bat, but looks like big brown bat  6—12 grams, 9—10 in wingspan  Forearm 33—39mm  Tragus short, curved, rounded  Usually uniformly dark  Range is mainly south of LBB’s but overlaps in mid-Atlantic  Uses buildings in summer  No one knows what they do in winter, but one was recovered from a moving box in winter. Possibly had been in attic.
  24. 24. Evening Bat Little Brown Bat
  25. 25.  Formerly Eastern pipistrelle  Very small bat with reddish brown fur and red forearms  6—8 g; up to 9 in wingspan  Forearm 31—35 mm  Long, pointed ears  Banded fur; dark, light, dark  Forms small maternity colonies in tree hollows and sometimes under decks and open barn lofts  Has twins; pups are under 1 g at birth  Migrates to caves for winter  Often killed at turbine sites
  26. 26.  Very distinctive; black or deep chocolate brown with silver tipping on dorsal fur. Face, ear, and facial fur are uniformly dark.  Medium sized ; 8—12g  Forearm 37—44mm; wingspan 11 in  Not usually associated with buildings, but have been recovered from open sheds and garages during winter  May enter caves on occasion  Form small maternity colonies in tree hollows in northeast or in higher elevations in mid-Atlantic  Considered highly migratory; found dead at wind turbines
  27. 27.  Very distinctive; buffy, gray, & rust fur; black points; short, rounded ears with black rims  Forearm 46—58mm; 16 in wingspan  Largest North American Bat; 20—38 grams  Migratory; may move from Canada to Mexico; overwinters in mid-Atlantic; lactating female recovered in Haymarket, VA in 2013  Foliage bat; does not use buildings  Highly impacted by wind turbines
  28. 28.  Buffy, sandy, or red with short, rounded ears  Medium sized bat; 9—15g  Forearm 35-45mm; 12 in wingspan  Males are smaller and more brightly colored  Highly migratory; common wind turbine victims  Foliage bat; does not use buildings  Solitary; raises young in tree foliage  Mates on the wing  Often hit by cars  Prone to window strikes  Blue Jays prey on mothers with young
  29. 29.  Very similar to red bats  Deep russet fur, mahogany colored skin  10—15 g; forearm 35—45 mm  12 in wingspan  Known from the southern coastal regions SmithsonianMuseumofNaturalHistory
  30. 30.  Pale yellowish fur  Larger than reds or Seminoles  18—24g; forearm 45—56 mm  Wingspan 14—15 in  Only recorded from one county in SE VA John Abbott
  31. 31.  ENDANGERED  Lumpy nose  Ears more than 1” long  9—12 g  Cave dependent year round  Very sensitive to disturbance  Virginia state bat!  State ENDANGERED  Very similar to VBEB  Ears more than 1” long  8—14 g  Highly associated with tree hollows in swamps, but uses other habitats in range