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Berks
Illustrated Checklist
Powered by Macaulay Library and eBirdUpdated ~19 hours ago
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Native and Naturalized (341)
Exotic: Escapee (14)
Hybrids (14)
- Snow x Ross's Goose (hybrid) Anser caerulescens x rossiiLast observed by Rudolph Keller on 1 Feb 2024
- Swan Goose x Canada Goose (hybrid) Anser cygnoides x Branta canadensisLast observed by Aaron Shirk on 9 Nov 2021
- Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensisLast observed by Jacob Socolar on 6 Mar 2024
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Kerry Grim on 9 Sep 2022
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by Peter & Jane Wolfe on 11 Jan 2024
- Snow x Canada Goose (hybrid) Anser caerulescens x Branta canadensisLast observed by Rudolph Keller on 10 Feb 2024
- Muscovy Duck x Mallard (hybrid) Cairina moschata x Anas platyrhynchosLast observed by Kerry Grim on 25 Nov 1999
- Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchosLast observed by Rudolph Keller on 10 Dec 2022
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Russell Hoffman on 25 Apr 2024
- Mallard x Northern Pintail (hybrid) Anas platyrhynchos x acutaLast observed by Todd Underwood on 27 Jan 2024
- Herring x Lesser Black-backed Gull (hybrid) Larus argentatus x fuscusLast observed by Rudolph Keller on 5 Jan 2024
- Carolina x Black-capped Chickadee (hybrid) Poecile carolinensis x atricapillusLast observed by David Barber on 7 May 2024
- Dark-eyed Junco x White-throated Sparrow (hybrid) Junco hyemalis x Zonotrichia albicollisLast observed by Jacob Socolar on 30 Oct 2022
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Paul Heveran on 8 Sep 2017
Additional Taxa (87)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by kevin dougherty on 23 Feb 2023
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Jacob Socolar on 3 Mar 2024
- Ring-necked/Green Pheasant Phasianus colchicus/versicolorLast observed by Susan Cezanne on 15 Nov 2023
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Mike Slater on 24 May 2020
- Common Ringed/Semipalmated Plover Charadrius hiaticula/semipalmatusLast observed by Dan Brennan on 21 May 2022
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Rudolph Keller on 22 Aug 2020
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaLast observed by Rudolph Keller on 30 Sep 2023
- Long-tailed/Parasitic Jaeger Stercorarius longicaudus/parasiticusLast observed by Dan Altif on 11 Sep 2016
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaLast observed by Peter Montgomery on 3 Sep 2014
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Steven Fordyce on 28 Apr 2024
- Red-shouldered/Broad-winged Hawk Buteo lineatus/platypterusLast observed by Jacob Socolar on 23 Sep 2022
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by kevin dougherty on 6 Sep 2023
- Philadelphia/Warbling Vireo Vireo philadelphicus/gilvusLast observed by Peter Montgomery on 4 Sep 2014
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by Vale Deeter on 11 May 2024
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Anonymous eBirder on 18 Apr 2024
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Rudolph Keller on 21 Sep 2023
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Anonymous eBirder on 18 Apr 2021
- Connecticut/MacGillivray's/Mourning Warbler Oporornis/Geothlypis sp. (Mourning-type)Last observed by Kerry Grim on 25 Sep 2021
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Todd Underwood on 21 Sep 2023