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Photo © Julie Byrne, all rights reserved
Santa Rosa, Santa Rosa, California, US (Google, OSM)
38.4226429191, -122.6659617157
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Description

I originally thought it was an Antrozous pallidus (Pallid Bat), but the ears aren't long enough. The overall bat size is a bit too big to be a local myotis species. Any thoughts on the ID?
Here are my observations about its physical characteristics:
Head and body 66 mm
Tail 33 mm
Nose to tail 99 mm
No keeled calcar
No "free-tail", tail extends to tip of membrane
Forearm length 2-1/4 inch
Ears 20 mm
Flat, forward-pointing ears. Not pointed at the end.
Pointed tragus
No fringe
No hair on feet
No nose leaf
Nostrils forward-facing
Nostrils distinct but maybe not "pig-like".
Dorsal fur: pale at roots, tipped brown
Ventral fur: white
No yellow colors
Light-colored ears and face
Found dead, no "white nose" fungus observed.
My student Hailey Williams brought this in. She has several bats roosting in her neighborhood.
NOTE: My measurements weren't exactly lined up in the photos (also, the wing was not fully stretched out).

May. 17, 2012 20:14:54 -0700
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Comments & Identifications

1045-thumb

Maybe I'll change the name to simply "bat" (instead of "microbat") to see if I get any ID bites.

Posted by protecthabitat over 2 years ago (Flag)
4873-thumb
Pallid Bat - Photo (c) Keaton Wilson, some rights reserved (CC BY)
mperdicas's ID: Pallid Bat (Antrozous pallidus)
Posted by mperdicas over 2 years ago (Flag)
4873-thumb

I think this looks like a pallid bat. Now I am from the east and have no experience with pallid bats, but it fits your detailed descriptions. Agreed, some of the measurements are off, but I've measured many bats and there can be a lot of variation in your measurements, especially if you don't do this all the time!
I looked up the pallid bat and everything else fits, including their propensity to roost in buildings.

Posted by mperdicas over 2 years ago (Flag)
1045-thumb
Pallid Bat - Photo (c) Keaton Wilson, some rights reserved (CC BY)
protecthabitat's ID: Pallid Bat (Antrozous pallidus)
Posted by protecthabitat over 2 years ago (Flag)
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Identification Summary

Pallid Bat - Photo (c) Keaton Wilson, some rights reserved (CC BY)
protecthabitat's ID: Pallid Bat (Antrozous pallidus)
Pallid Bat - Photo (c) Keaton Wilson, some rights reserved (CC BY)
Community ID: Pallid Bat (Antrozous pallidus)
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mperdicas 1 person agrees
protecthabitat would like some help identifying this

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Data Quality Assessment

Community-supported ID? Yes
1 person agrees
0 people disagree
Date? Yes
Georeferenced? Yes
Photos or sounds? Yes
Is the organism wild/naturalized? Unknown
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Does the location seem accurate? Unknown
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Does the date seem accurate? Unknown
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Appropriate? Yes
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Observation © Julie Byrne
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