| Total Records: | |||
| Date | Location | Species | ObsID |
|---|---|---|---|
| 1909/05/22 | Union, Illinois | Pipistrellus subflavus | 23232 |
| 1941/02/01 | Monroe, Illinois | Pipistrellus subflavus | 11264 |
| 1942/10/05 | Alexander, Illinois | Pipistrellus subflavus | 6112 |
| 1942/10/05 | Alexander, Illinois | Corynorhinus rafinesquii | 6113 |
| 1949/05/09 | Fulton, Illinois | Nycticeius humeralis | 18313 |
| 1951/05/24 | Fulton, Illinois | Lasionycteris noctivagans | 18312 |
| 1953/00/00 | Hardin, Illinois | Myotis austroriparius | 17747 |
| 1953/00/00 | LaSalle, Illinois | Myotis sodalis | 17739 |
| 1953/00/00 | Hardin, Illinois | Myotis austroriparius | 14368 |
| 1953/00/00 | Jo Daviess, Illinois | Eptesicus fuscus | 14377 |
| 1953/06/25 | Pike, Illinois | Myotis grisescens | 14370 |
| 1953/07/15 | Randolph, Illinois | Pipistrellus subflavus | 14375 |
| 1953/07/15 | Bond, Illinois | Nycticeius humeralis | 14379 |
| 1953/08/24 | Jo Daviess, Illinois | Eptesicus fuscus | 14378 |
| 1953/08/26 | Cumberland, Illinois | Nycticeius humeralis | 14380 |
| 1953/10/01 | Pike, Illinois | Myotis grisescens | 14369 |
| 1953/10/01 | Pike, Illinois | Myotis grisescens | 17749 |
| 1953/10/28 | Hardin, Illinois | Myotis grisescens | 17748 |
| 1953/11/01 | Cumberland, Illinois | Nycticeius humeralis | 14381 |
| 1953/12/00 | Hardin, Illinois | Myotis sodalis | 13608 |
| 1953/12/00 | Pike, Illinois | Myotis grisescens | 14371 |
| 1953/12/09 | Jo Daviess, Illinois | Myotis sodalis | 14372 |
| 1953/12/09 | Jo Daviess, Illinois | Pipistrellus subflavus | 14376 |
| 1954/00/00 | Hardin, Illinois | Myotis sodalis | 17743 |
| 1954/01/27 | Alexander, Illinois | Lasionycteris noctivagans | 14373 |
| 1954/02/02 | Alexander, Illinois | Lasionycteris noctivagans | 14374 |
| 1954/02/02 | Alexander, Illinois | Corynorhinus rafinesquii | 14382 |
| 1954/02/20 | LaSalle, Illinois | Myotis lucifugus | 23712 |
| 1954/07/00 | Jackson, Illinois | Myotis lucifugus | 23774 |
| 1954/07/00 | Pike, Illinois | Myotis grisescens | 19052 |
| 1954/07/00 | Carroll, Illinois | Myotis lucifugus | 19056 |
| 1954/11/00 | Hardin, Illinois | Myotis lucifugus | 23775 |
| 1954/11/00 | Hardin, Illinois | Myotis lucifugus | 23776 |
| 1954/11/00 | Hardin, Illinois | Myotis lucifugus | 23777 |
| 1954/11/00 | Union, Illinois | Myotis lucifugus | 23778 |
| 1954/12/21 | Hardin, Illinois | Myotis austroriparius | 23779 |
| 1954/12/21 | Hardin, Illinois | Myotis austroriparius | 23781 |
| 1954/12/21 | Hardin, Illinois | Myotis septentrionalis | 23783 |
| 1954/12/21 | Hardin, Illinois | Myotis sodalis | 23785 |
| 1954/12/31 | Union, Illinois | Myotis sodalis | 23796 |
| 1954/12/31 | Union, Illinois | Myotis sodalis | 17745 |
| 1955/00/00 | LaSalle, Illinois | Eptesicus fuscus | 11266 |
| 1955/01/30 | Union, Illinois | Corynorhinus rafinesquii | 23794 |
| 1955/01/30 | Union, Illinois | Corynorhinus rafinesquii | 23795 |
| 1955/02/05 | Union, Illinois | Myotis lucifugus | 23797 |
| 1955/02/05 | Union, Illinois | Myotis austroriparius | 23782 |
| 1955/02/12 | Alexander, Illinois | Myotis septentrionalis | 23784 |
| 1955/02/12 | Alexander, Illinois | Lasionycteris noctivagans | 23787 |
| 1955/02/12 | Alexander, Illinois | Lasionycteris noctivagans | 23788 |
| 1955/03/00 | Hardin, Illinois | Myotis austroriparius | 23780 |
| 1955/03/12 | Hardin, Illinois | Myotis sodalis | 23786 |
| 1955/04/00 | Jackson, Illinois | Eptesicus fuscus | 23789 |
| 1955/05/00 | Jackson, Illinois | Eptesicus fuscus | 23790 |
| 1955/06/00 | Jackson, Illinois | Eptesicus fuscus | 23791 |
| 1955/06/13 | Unknown, Illinois | Lasiurus borealis | 23793 |
| 1955/08/00 | Jackson, Illinois | Eptesicus fuscus | 23792 |
| 1956/12/00 | LaSalle, Illinois | Myotis sodalis | 13568 |
| 1957/02/16 | LaSalle, Illinois | Pipistrellus subflavus | 25691 |
| 1957/07/00 | Cass, Illinois | Myotis lucifugus | 19057 |
| 1957/12/00 | LaSalle, Illinois | Myotis sodalis | 13569 |
| 1957/12/00 | Hardin, Illinois | Myotis sodalis | 13572 |
| 1958/00/00 | Hardin, Illinois | Myotis grisescens | 1589 |
| 1958/12/00 | Union, Illinois | Corynorhinus rafinesquii | 23271 |
| 1958/12/00 | Alexander, Illinois | Corynorhinus rafinesquii | 23272 |
| 1958/12/00 | Union/Alexander, Illinois | Myotis lucifugus | 23268 |
| 1958/12/00 | Hardin, Illinois | Myotis sodalis | 13573 |
| 1958/12/00 | LaSalle, Illinois | Myotis sodalis | 13570 |
| 1958/12/30 | Union/Alexander, Illinois | Myotis septentrionalis | 23265 |
| 1958/12/30 | Union/Alexander, Illinois | Pipistrellus subflavus | 23266 |
| 1958/12/30 | Union/Alexander, Illinois | Eptesicus fuscus | 23267 |
| 1959/00/00 | Hardin, Illinois | Myotis grisescens | 1590 |
| 1959/01/02 | Union/Alexander, Illinois | Eptesicus fuscus | 23270 |
| 1959/02/07 | Union/Alexander, Illinois | Eptesicus fuscus | 23269 |
| 1959/02/19 | Alexander, Illinois | Lasionycteris noctivagans | 23273 |
| 1959/02/19 | Alexander, Illinois | Corynorhinus rafinesquii | 23274 |
| 1959/02/19 | Alexander, Illinois | Myotis septentrionalis | 23275 |
| 1959/03/14 | Union/Alexander, Illinois | Pipistrellus subflavus | 23258 |
| 1959/03/14 | Union/Alexander, Illinois | Myotis septentrionalis | 23259 |
| 1959/03/14 | Union/Alexander, Illinois | Lasionycteris noctivagans | 23260 |
| 1959/12/00 | LaSalle, Illinois | Myotis sodalis | 13571 |
| 1960/00/00 | Hardin, Illinois | Myotis grisescens | 1591 |
| 1960/00/00 | LaSalle, Illinois | Myotis sodalis | 11360 |
| 1960/00/00 | Hardin, Illinois | Myotis sodalis | 11361 |
| 1960/02/07 | Union/Alexander, Illinois | Pipistrellus subflavus | 23261 |
| 1960/02/07 | Union/Alexander, Illinois | Myotis septentrionalis | 23262 |
| 1960/02/07 | Union/Alexander, Illinois | Myotis lucifugus | 23263 |
| 1960/02/07 | Union/Alexander, Illinois | Corynorhinus rafinesquii | 23264 |
| 1960/03/10 | Alexander, Illinois | Lasionycteris noctivagans | 23276 |
| 1961/00/00 | Hardin, Illinois | Myotis grisescens | 1592 |
| 1961/10/22 | LaSalle, Illinois | Myotis lucifugus | 23709 |
| 1961/11/05 | LaSalle, Illinois | Myotis lucifugus | 23718 |
| 1962/02/04 | LaSalle, Illinois | Myotis lucifugus | 23723 |
| 1962/04/15 | LaSalle, Illinois | Myotis lucifugus | 23715 |
| 1962/04/22 | LaSalle, Illinois | Myotis lucifugus | 23722 |
| 1962/08/12 | Champaign, Illinois | Lasiurus borealis | 5027 |
| 1962/08/14 | Champaign, Illinois | Lasiurus borealis | 5028 |
| 1962/08/16 | Champaign, Illinois | Lasiurus borealis | 5029 |
| 1962/08/18 | Champaign, Illinois | Lasiurus borealis | 5030 |
| 1962/09/29 | LaSalle, Illinois | Myotis lucifugus | 23721 |
| 1962/09/29 | LaSalle, Illinois | Myotis lucifugus | 23716 |
| 1963/00/00 | Hardin, Illinois | Myotis grisescens | 1593 |
| 1963/05/11 | LaSalle, Illinois | Myotis lucifugus | 23711 |
| 1963/10/20 | LaSalle, Illinois | Myotis lucifugus | 23708 |
| 1963/11/09 | LaSalle, Illinois | Myotis lucifugus | 23717 |
| 1963/11/10 | LaSalle, Illinois | Myotis lucifugus | 23719 |
| 1963/11/10 | LaSalle, Illinois | Myotis sodalis | 23724 |
| 1964/11/07 | LaSalle, Illinois | Myotis lucifugus | 23713 |
| 1964/11/08 | LaSalle, Illinois | Myotis lucifugus | 23710 |
| 1964/11/09 | LaSalle, Illinois | Myotis lucifugus | 23720 |
| 1966/11/07 | Union, Illinois | Myotis sodalis | 17746 |
| 1968/10/11 | Madison, Illinois | Myotis grisescens | 17750 |
| 1968/10/18 | LaSalle, Illinois | Myotis lucifugus | 23714 |
| 1968/11/24 | Pike, Illinois | Myotis sodalis | 17741 |
| 1971/02/14 | LaSalle, Illinois | Pipistrellus subflavus | 25689 |
| 1971/02/25 | LaSalle, Illinois | Pipistrellus subflavus | 25690 |
| 1974/00/00 | Hardin, Illinois | Myotis sodalis | 17744 |
| 1974/00/00 | Union, Illinois | Pipistrellus subflavus | 23516 |
| 1974/00/00 | Union, Illinois | Pipistrellus subflavus | 23504 |
| 1974/00/00 | Union, Illinois | Myotis lucifugus | 23505 |
| 1974/00/00 | Union, Illinois | Pipistrellus subflavus | 23506 |
| 1974/00/00 | Union, Illinois | Myotis lucifugus | 23507 |
| 1974/00/00 | Union, Illinois | Eptesicus fuscus | 23508 |
| 1974/00/00 | Union, Illinois | Myotis septentrionalis | 23509 |
| 1974/00/00 | Union, Illinois | Myotis austroriparius | 23510 |
| 1974/00/00 | Union, Illinois | Eptesicus fuscus | 23511 |
| 1974/00/00 | Union, Illinois | Pipistrellus subflavus | 23512 |
| 1974/00/00 | Union, Illinois | Eptesicus fuscus | 23513 |
| 1974/00/00 | Union, Illinois | Myotis septentrionalis | 23514 |
| 1974/00/00 | Alexander, Illinois | Pipistrellus subflavus | 23466 |
| 1974/00/00 | Alexander, Illinois | Myotis lucifugus | 23467 |
| 1974/00/00 | Alexander, Illinois | Eptesicus fuscus | 23468 |
| 1974/00/00 | Alexander, Illinois | Pipistrellus subflavus | 23469 |
| 1974/00/00 | Alexander, Illinois | Eptesicus fuscus | 23470 |
| 1974/00/00 | Alexander, Illinois | Eptesicus fuscus | 23471 |
| 1974/00/00 | Alexander, Illinois | Pipistrellus subflavus | 23472 |
| 1974/00/00 | Alexander, Illinois | Eptesicus fuscus | 23473 |
| 1974/00/00 | Alexander, Illinois | Pipistrellus subflavus | 23474 |
| 1974/00/00 | Alexander, Illinois | Myotis lucifugus | 23475 |
| 1974/00/00 | Alexander, Illinois | Eptesicus fuscus | 23476 |
| 1974/00/00 | Alexander, Illinois | Pipistrellus subflavus | 23477 |
| 1974/00/00 | Hardin, Illinois | Myotis septentrionalis | 23478 |
| 1974/00/00 | Hardin, Illinois | Pipistrellus subflavus | 23480 |
| 1974/00/00 | Hardin, Illinois | Myotis lucifugus | 23481 |
| 1974/00/00 | Hardin, Illinois | Myotis lucifugus | 23482 |
| 1974/00/00 | Hardin, Illinois | Eptesicus fuscus | 23483 |
| 1974/00/00 | Jackson, Illinois | Myotis septentrionalis | 23484 |
| 1974/00/00 | Hardin, Illinois | Eptesicus fuscus | 23485 |
| 1974/00/00 | Jackson, Illinois | Myotis lucifugus | 23486 |
| 1974/00/00 | Jackson, Illinois | Pipistrellus subflavus | 23487 |
| 1974/00/00 | Jackson, Illinois | Pipistrellus subflavus | 23488 |
| 1974/00/00 | Jackson, Illinois | Pipistrellus subflavus | 23489 |
| 1974/00/00 | Pope, Illinois | Myotis lucifugus | 23490 |
| 1974/00/00 | Pope, Illinois | Eptesicus fuscus | 23491 |
| 1974/00/00 | Pope, Illinois | Pipistrellus subflavus | 23492 |
| 1974/00/00 | Pope, Illinois | Pipistrellus subflavus | 23493 |
| 1974/00/00 | Saline, Illinois | Pipistrellus subflavus | 23494 |
| 1974/00/00 | Union, Illinois | Pipistrellus subflavus | 23495 |
| 1974/00/00 | Union, Illinois | Myotis lucifugus | 23496 |
| 1974/00/00 | Union, Illinois | Pipistrellus subflavus | 23497 |
| 1974/00/00 | Union, Illinois | Myotis lucifugus | 23498 |
| 1974/00/00 | Union, Illinois | Pipistrellus subflavus | 23499 |
| 1974/02/26 | Union, Illinois | Pipistrellus subflavus | 23500 |
| 1974/02/26 | Union, Illinois | Myotis lucifugus | 23501 |
| 1974/02/26 | Union, Illinois | Eptesicus fuscus | 23502 |
| 1974/02/26 | Union, Illinois | Myotis austroriparius | 23503 |
| 1974/03/08 | Hardin, Illinois | Pipistrellus subflavus | 23479 |
| 1974/08/27 | Hardin, Illinois | Pipistrellus subflavus | 23450 |
| 1974/08/27 | Hardin, Illinois | Eptesicus fuscus | 23451 |
| 1974/08/27 | Hardin, Illinois | Myotis septentrionalis | 23452 |
| 1974/08/27 | Hardin, Illinois | Myotis lucifugus | 23453 |
| 1974/08/27 | Hardin, Illinois | Myotis austroriparius | 23454 |
| 1974/08/28 | Hardin, Illinois | Myotis grisescens | 23455 |
| 1974/08/28 | Hardin, Illinois | Myotis lucifugus | 23456 |
| 1974/08/28 | Hardin, Illinois | Myotis austroriparius | 23457 |
| 1974/08/28 | Hardin, Illinois | Pipistrellus subflavus | 23458 |
| 1974/08/28 | Hardin, Illinois | Myotis septentrionalis | 23459 |
| 1974/08/28 | Hardin, Illinois | Eptesicus fuscus | 23460 |
| 1974/08/28 | Hardin, Illinois | Myotis grisescens | 23465 |
| 1974/08/28 | Hardin, Illinois | Pipistrellus subflavus | 23518 |
| 1974/08/29 | Union, Illinois | Myotis septentrionalis | 23461 |
| 1974/08/29 | Union, Illinois | Eptesicus fuscus | 23462 |
| 1974/08/29 | Union, Illinois | Myotis lucifugus | 23463 |
| 1974/08/29 | Union, Illinois | Pipistrellus subflavus | 23464 |
| 1974/12/04 | Hardin, Illinois | Pipistrellus subflavus | 23517 |
| 1974/12/06 | Union, Illinois | Corynorhinus rafinesquii | 23515 |
| 1975/00/00 | LaSalle, Illinois | Myotis sodalis | 11394 |
| 1975/00/00 | Hardin, Illinois | Myotis sodalis | 11395 |
| 1977/01/00 | Cook, Illinois | Lasionycteris noctivagans | 4879 |
| 1977/07/29 | Johnson, Illinois | Corynorhinus rafinesquii | 17751 |
| 1977/08/05 | Johnson, Illinois | Corynorhinus rafinesquii | 17752 |
| 1977/09/09 | Johnson, Illinois | Corynorhinus rafinesquii | 17753 |
| 1978/06/00 | Johnson, Illinois | Corynorhinus rafinesquii | 17754 |
| 1979/06/00 | Johnson, Illinois | Corynorhinus rafinesquii | 17755 |
| 1980/06/00 | Johnson, Illinois | Corynorhinus rafinesquii | 17756 |
| 1981/06/00 | Johnson, Illinois | Corynorhinus rafinesquii | 17757 |
| 1982/01/00 | Monroe, Illinois | Myotis sodalis | 17218 |
| 1982/06/00 | Johnson, Illinois | Corynorhinus rafinesquii | 17758 |
| 1982/10/19 | Adams, Illinois | Myotis sodalis | 17742 |
| 1983/00/00 | LaSalle, Illinois | Myotis sodalis | 17740 |
| 1983/01/00 | LaSalle, Illinois | Myotis sodalis | 17219 |
| 1983/06/00 | Johnson, Illinois | Corynorhinus rafinesquii | 17759 |
| 1985/00/00 | Hardin, Illinois | Myotis sodalis | 17207 |
| 1985/00/00 | Hardin, Illinois | Myotis grisescens | 17208 |
| 1985/00/00 | LaSalle, Illinois | Myotis sodalis | 17231 |
| 1985/00/00 | Pike, Illinois | Myotis sodalis | 17202 |
| 1985/00/00 | Pike, Illinois | no species present no species present | 17203 |
| 1985/00/00 | Monroe, Illinois | Myotis sodalis | 17204 |
| 1985/00/00 | Jackson, Illinois | no species present no species present | 17205 |
| 1985/00/00 | Union, Illinois | Myotis sodalis | 17206 |
| 1985/01/00 | LaSalle, Illinois | Myotis sodalis | 17220 |
| 1985/01/00 | Monroe, Illinois | Myotis sodalis | 17221 |
| 1986/00/00 | Adams/Pike, Illinois | no species present no species present | 17209 |
| 1986/00/00 | Hardin, Illinois | Myotis sodalis | 17210 |
| 1986/01/00 | Monroe, Illinois | Myotis sodalis | 17222 |
| 1987/00/00 | Adams, Illinois | Myotis sodalis | 17211 |
| 1987/00/00 | Pike, Illinois | unknown unknown | 17212 |
| 1987/00/00 | Edgar, Illinois | Myotis septentrionalis | 21728 |
| 1987/01/00 | LaSalle, Illinois | Myotis sodalis | 17223 |
| 1987/01/00 | Monroe, Illinois | Myotis sodalis | 17224 |
| 1987/05/05 | Williamson, Illinois | Myotis lucifugus | 4787 |
| 1987/09/01 | Clark, Illinois | Eptesicus fuscus | 21631 |
| 1987/09/01 | Clark, Illinois | Eptesicus fuscus | 21632 |
| 1987/09/01 | Edgar, Illinois | Eptesicus fuscus | 21634 |
| 1987/10/16 | Crawford, Illinois | Eptesicus fuscus | 21633 |
| 1988/00/00 | Union, Illinois | Myotis sodalis | 17213 |
| 1988/00/00 | Pope, Illinois | Myotis sodalis | 17214 |
| 1988/00/00 | Carroll, Illinois | no species present no species present | 17215 |
| 1988/00/00 | Adams, Illinois | Myotis sodalis | 17216 |
| 1988/00/00 | Pope, Illinois | Myotis sodalis | 17217 |
| 1988/00/00 | Edgar, Illinois | Eptesicus fuscus | 21636 |
| 1988/00/00 | Vermillion, Illinois | Eptesicus fuscus | 21637 |
| 1988/09/19 | Edgar, Illinois | Eptesicus fuscus | 21635 |
| 1989/01/00 | LaSalle, Illinois | Myotis sodalis | 17225 |
| 1989/01/18 | Monroe, Illinois | Myotis sodalis | 17226 |
| 1989/03/00 | Union, Illinois | Myotis sodalis | 17227 |
| 1990/03/00 | Union, Illinois | Myotis sodalis | 17228 |
| 1992/07/08 | Cass, Illinois | Myotis sodalis | 4880 |
| 1992/07/13 | Cass, Illinois | Myotis sodalis | 4881 |
| 1992/10/14 | Cass, Illinois | Myotis sodalis | 4882 |
| 1992/10/23 | Cass, Illinois | Myotis sodalis | 4883 |