Photographic guide to bats in va and md
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Photographic Guide to Bats in VA and MD. By The Save Lucy Campaign www.saveLucythebat.org. Important information. Slide show is intended for bat rehabilitators and bat enthusiasts. Please feel free to distribute, but be nice and credit the source.

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Photographic guide to bats in va and md

Photographic Guide to Bats in VA and MD

By The Save Lucy Campaignwww.saveLucythebat.org


Important information
Important information

  • 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.

  • All photos belong to Rich Sturges and/or The Save Lucy Campaign, unless otherwise noted.

  • 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!




Tragus
Tragus

The narrow element in the ear


EARS

Shape

Length


Side view
SIDE VIEW

Color of dorsal vs.ventral fur

Color of wing, tail membrane

Overall size


Forearm
FOREARM

Measure!!


FOOT

Measure!!


Toe hairs
Toe Hairs

Copious?

Long?

Usually need magnification and very good light to see


No!!

Keel

Yes!!


Membrane attachment
Membrane Attachment

At top of toe

At ankle

Only important for a few species


Claws
CLAWS

Some species have notched claws

This one does not


FUR

Look for bands of color or uniform throughout

Colors will vary within species


Big brown bat
Big Brown Bat

  • Nonmigratory

  • Uses buildings summer and winter

  • Also uses caves and mines for

    hibernation

  • Beetle eater

  • 16—20+ grams; 14 inch wingspan

  • 2 young per year born late

    May early June

  • Lifespan 15—18 years


Little brown bat
Little Brown Bat

  • 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

  • 7—9 grams; 9 inch wingspan

  • One pup per year

  • Lifespan 30+ years


Compare
Compare

Big Brown Bat

Little Brown Bat


Indiana bat
Indiana Bat

  • 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: John Chenger, Bat Conservation & Management, Inc.

Courtesy: NY DEC


Compare1
Compare

Little Brown Bat

Indiana Bat

Photo by Adam Mann, Environmental Solutions and Innovations


Northern long eared bat
Northern Long-Eared Bat

  • Closely related to Indiana bats

    and Little Brown Bats; very similar in

    appearance

  • Extremely long ears, extend

    4mm past nose when pushed

    forward

  • May roost with other myotis

    species or in small colonies of

    conspecifics

  • Same size as Little Brown/

    Indiana Bats

  • Migrates to caves for

    winter


Eastern small footed bat
Eastern Small-Footed Bat

  • Smallest bat in region; 3—5g

  • Distinctive black mask

  • Foot is only 8mm; keeled calcar

  • Forearm 30—36mm

  • Associated with scree and talus

    slopes

  • Largest known hibernacula for

    this species WERE in NY, now MD

  • Rare across range

  • 4—5 grams

  • Dependant on puddles and road

    ruts for drinking water


Evening bat
Evening Bat

  • Small bat; 6—12 grams

  • Forearm 33—39mm

  • Tragus short, curved, rounded

  • Usually uniformly dark

  • Range is mainly south of LBB’s but overlaps in mid-Atlantic

  • But looks like a mini Big Brown

  • 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.


Tricolored bat
Tricolored Bat

  • Formerly Eastern pipistrelle

  • Very small bat with reddish

    brown fur and red forearms

  • 6—10g

  • Forearm 31--35mm

  • Banded fur; dark, light, dark

  • Forms small maternity colonies in tree

    hollows and sometimes

    under decks and in open

    lofts

  • Has twins; pups are

    under 1 g at birth

  • Migrates to caves for winter

  • Also killed at turbine sites


Silver hair bats
Silver Hair Bats

  • Very distinctive; black with

    silver tipping on dorsal fur

  • Medium sized ; 8—12g

  • Forearm 37—44mm

  • Considered highly migratory;

    found dead at wind turbines

  • Not usually associated with

    buildings, but have been recovered

    from open sheds and garages during

    winter

  • Some use caves in winter

  • Form small maternity colonies

    in tree hollows in northeast or in

    higher elevations in mid-Atlantic


Hoary bat
Hoary Bat

  • Very distinctive; buffy, gray,

    & rust fur; black points; black

    rims on ears.

  • Forearm 46—58mm

  • Largest North American Bat;

    20—38 grams

  • Migratory; may move from

    Canada to Mexico

  • Foliage bat; does not use

    buildings

  • Highly impacted by wind

    turbines


Eastern red bat
Eastern Red Bat

  • Buffy, sandy, or red

  • Medium sized bat; 9—15g

  • Forearm 35-45mm

  • 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


Virginia big ear bat
Virginia Big Ear Bat

  • ENDANGERED

  • Lumpy nose

  • Ears more than 1” long

  • 9—12 g

  • Cave dependant year round

  • Very sensitive to disturbance

  • Virginia state bat!

Rafinesque’s Big Ear 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


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