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Calaveras
Illustrated Checklist
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Native and Naturalized (271)
Exotic: Provisional (1)
Exotic: Escapee (3)
Hybrids (2)
- Eurasian x American Wigeon (hybrid) Mareca penelope x americanaLast observed by John Harris on 8 Jan 2021
- Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus nuchalis x ruberLast observed by Daniel Airola on 27 Dec 2020
Additional Taxa (48)
- Western/Clark's Grebe Aechmophorus occidentalis/clarkiiLast observed by Daniel Airola on 14 Apr 2024
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Ron McDow on 26 Oct 2018
- Downy/Hairy Woodpecker Dryobates pubescens/villosusLast observed by Bruce McClenahan on 21 Apr 2024
- Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseriLast observed by Dan Murphy on 24 Jun 1976
- Townsend's/Hermit Warbler Setophaga townsendi/occidentalisLast observed by Tom Johnson on 16 Sep 2018