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Monmouth Sewage Ponds (restricted access)
Illustrated Checklist
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Native and Naturalized (167)
Exotic: Escapee (1)
Hybrids (4)
- Eurasian x American Wigeon (hybrid) Mareca penelope x americanaLast observed by Barbara Dolan on 19 Jan 2023
- Tufted Duck x Lesser Scaup (hybrid) Aythya fuligula x affinisLast observed by Nick Lethaby on 7 Jan 1989
- Tufted Duck x scaup sp. (hybrid) Aythya fuligula x marila/affinisLast observed by Tim Shelmerdine on 20 Feb 1989
- Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescensLast observed by Joan Baker on 29 Dec 2023
Additional Taxa (30)
- Common/Barrow's Goldeneye Bucephala clangula/islandicaLast observed by Neil Bjorklund on 19 Jan 2023
- Western/Clark's Grebe Aechmophorus occidentalis/clarkiiLast observed by Anthony Hewetson on 9 Oct 1988
- Western/Glaucous-winged Gull Larus occidentalis/glaucescensLast observed by Bill Shelmerdine on 25 Jan 2023
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Caleb Centanni on 26 Dec 2022