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Middlesex
Illustrated Checklist
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Native and Naturalized (343)
Exotic: Escapee (9)
Hybrids (9)
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Stephanie Stewart on 31 Aug 2020
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by Jennifer McGuinness on 14 Jan 2023
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Richard Sirull on 13 Dec 2023
- Common x Barrow's Goldeneye (hybrid) Bucephala clangula x islandicaLast observed by Tim Antanaitis on 12 Mar 2018
- Herring x Glaucous Gull (hybrid) Larus argentatus x hyperboreusLast observed by Nick Bonomo on 5 Feb 2017
- Little Blue x Tricolored Heron (hybrid) Egretta caerulea x tricolorLast observed by Georgia Peirce on 2 Oct 2019
- Red-shouldered x Red-tailed Hawk (hybrid) Buteo lineatus x jamaicensisLast observed by Jeff Fengler on 8 Mar 2020
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Dan Cimbaro on 23 Jul 2017
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by Pamela Reeser on 24 Aug 2020
Additional Taxa (83)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Nancy Cohn on 3 Sep 2020
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Russ Smiley on 31 May 2023
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Bill Stowe on 22 Jul 2019
- storm-petrel sp. (white-rumped) Oceanitidae/Hydrobatidae sp. (white-rumped)Last observed by Frank Gallo on 30 Oct 2012
- Cory's/Great Shearwater Calonectris diomedea/Ardenna gravisLast observed by Nick Bonomo on 11 Jul 2020
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaLast observed by Jo Fasciolo on 30 Sep 2023
- Downy/Hairy Woodpecker Dryobates pubescens/villosusLast observed by Anonymous eBirder on 18 Feb 2024
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Jay Petersen on 1 Jul 2023
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Stephen Broker on 17 Nov 2018
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Stuart Winquist on 22 Oct 2021
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Colby Galliher on 9 May 2024