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Block Island
Illustrated Checklist
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Native and Naturalized (311)
Hybrids (1)
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Mike McBrien on 15 Dec 2022
Additional Taxa (44)
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Edward Jenkins on 25 Sep 2021
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Susan Roney Drennan on 8 Sep 1979
- Cory's/Great Shearwater Calonectris diomedea/Ardenna gravisLast observed by Frank Durso on 23 Jul 2020
- Downy/Hairy Woodpecker Dryobates pubescens/villosusLast observed by Heather Hatfield on 27 Apr 2021
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Olivia DaRugna on 15 Sep 2017
- Nelson's/Saltmarsh Sparrow (Sharp-tailed Sparrow) Ammospiza nelsoni/caudacutaLast observed by Rick Gedney on 12 Sep 2016
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Patricia Wood on 3 Oct 1999