| Specimen ID | 1548399 |
| Group | Reptiles-Crocodilians |
| Genus | Alligator |
| Species | mississippiensis |
| Common Name | American alligator |
| State | IL |
| County | Cook |
| Locality | Humboldt Park, Chicago, IL |
| Mapping Accuracy | Accurate |
| HUC8 Name | Chicago |
| HUC8 Number | 07120003 |
| HUC10 Name | North Branch Chicago River-Chicago Sanitary and Ship Canal |
| HUC10 Number | 0712000301 |
| HUC12 Name | Lower Branch Chicago River |
| HUC12 Number | 071200030106 |
| Map | |
| Collection Day | 12 |
| Collection Month | 7 |
| Collection Year | 2019 |
| Year Accuracy | Actual |
| Potential Pathway | released pet |
| Status | failed |
| Reference 1 |
| Ref. Number: | 33407 |
| Author: | Held, A. |
| Date: | 2019 |
| Title: | An Alligator surfaces at a Chicago lagoon and a city snaps to attention |
| Publisher: | NPR |
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| Reference 2 |
| Ref. Number: | 33425 |
| Author: | Serrano, A. and J. Anderson |
| Date: | 2019 |
| Title: | Alligator in Chicago’s Humboldt Park Lagoon caught overnight |
| Publisher: | Chicago Tribune |
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| Comments | Nicknamed "Chance the Snapper." Captured 7/16/19. |
| Record Type | Literature |
| Freshwater/Marine | Freshwater |
| Number Collected | 1 |
| Size | 5'3" |