Endangered Species Program
Midwest Region
empty

Home

Species Information

Listed Species in the Upper Midwest

Listed Species' Ranges by State and County

Candidate Species

Species of Concern

Featured Species

Bald Eagle

Canada Lynx

Freshwater Mussels

Gray Wolf

Indiana Bat

Karner Blue Butterfly

Kirtland's Warbler

Piping Plover

Whooping Crane

Endangered Species Act

FAQs

Glossary

Grants

HCPs

Listing

Permits

Recovery

Status
Assessments

S7 Consultation

Contacts

Regional Office Staff

ES Field Offices

 

empty

Indiana Bat

2007 Population Estimates

 

PDF Version

 

Estimates are based on winter surveys conducted at all known Priority 1 and 2 hibernacula throughout the species' range. Data from Priority 3 and 4 hibernacula has also been included for states that conducted surveys at these sites in 2006 or 2007.

 

USFWS

Region

State 2001 2003 2005 2007

% Change

from 2005

% of 2007 total
Region 2 Oklahoma 0 5 2 0 -100.00% 0.0%
empty
Region 3 Indiana 173,076 183,337 206,610 238,009 15.2% 46.4%
Missouri 67,900 67,089 65,157 64,554 -0.9% 12.6%
Illinois 21,053 43,028 54,630 54,033 -1.1% 10.5%
Ohio 9,788 9,831 9,769 7,629 -21.9% 1.5%
Michigan 20 20 20 20 0.0% 0.0%
Total 271,837 303,305 336,186 364,245 8.3% 70.9%
empty
Region 4 Kentucky 49,999 48,535 63,211 68,668 8.6% 13.4%
Tennessee 9,258 9,265 9,971 8,410 -15.7% 1.6%
Arkansas 2,475 2,228 2,067 1,779 -13.9% 0.3%
Alabama 173 265 296 258 -12.8% 0.1%
Total 61,905 60,293 75,545 79,115 4.7% 15.4%
empty
Region 5 New York 29,642 32,924 41,702 52,696 26.4% 10.3%
Pensylvania 702 853 746 1,038 39.1% 0.2%
West Virginia 9,714 9,742 13,417 14,597 8.8% 2.8%
Virginia 833 1,090 735 723 -1.6% 0.1%
New Jersey 107 644 652 659 1.1% 0.1%
Vermont 159 472 297 325 9.4% 0.1%
Total 41,157 45,725 57,549 70,038 21.7% 13.6%
empty
Rangewide Total: 374,899 409,328 469,282 513,398  
100.00%
empty
2-yr. Net Increase of:
34,429
59,954
44,116
 
% Increase of:
9.2%
14.6%
9.4%

 

 

NOTE: Missouri's 2001-2007 estimates assume 50,550 Indiana bats in Pilot Knob Mine based on previously calculated capture rates by R. Clawson and others.

 


 

Pie chart of 2007 Indiana bat population, by state.

 

Compiled by Andy King, U.S. Fish & Wildlife Service, Bloomington, Indiana, Ecological Services Field Office from data gathered from bat biologists throughout the species' range. (andrew_king@fws.gov)

 

Indiana Bat Rangewide Population 1981-2007

 

Back

 

 
Last updated: May 20, 2008