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Cass
Illustrated Checklist
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Native and Naturalized (322)
Exotic: Escapee (3)
Hybrids (7)
- Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensisLast observed by Keith Corliss on 30 Sep 2012
- Blue-winged x Cinnamon Teal (hybrid) Spatula discors x cyanopteraLast observed by Tim Lamey on 8 May 2022
- Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchosLast observed by Lydia BK on 19 Apr 2019
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Dean Riemer on 24 Apr 2020
- Spotted x Eastern Towhee (hybrid) Pipilo maculatus x erythrophthalmusLast observed by Patrick Beauzay on 13 May 2013
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Dean Riemer on 17 May 2009
Additional Taxa (54)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Torre Hovick on 27 Jun 2023
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Tim Lamey on 6 Aug 2022
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaLast observed by Charlotte Jacobson on 9 Aug 2023
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Leslie Schmidt on 11 Apr 2024
- Western/Eastern Wood-Pewee Contopus sordidulus/virensLast observed by Jason Hoeksema on 24 May 2014
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Shawn Kuck on 2 Sep 2023
- Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.Last observed by JAMES RAUCH on 25 Sep 2023
- Western/Eastern Meadowlark Sturnella neglecta/magnaLast observed by David Provencher on 11 Jul 2021