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Mariposa
Illustrated Checklist
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Native and Naturalized (287)
Exotic: Escapee (5)
Hybrids (3)
- Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus nuchalis x ruberLast observed by Zachary Foss on 28 Feb 2024
- Dark-eyed Junco x White-throated Sparrow (hybrid) Junco hyemalis x Zonotrichia albicollisLast observed by Steve Glover on 6 Dec 2008
- Lazuli x Indigo Bunting (hybrid) Passerina amoena x cyaneaLast observed by Matt Brady on 4 Jun 2010
Additional Taxa (55)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Mark Donahue on 8 Dec 2023
- Western/Clark's Grebe Aechmophorus occidentalis/clarkiiLast observed by Aidan Brubaker on 19 Nov 2022
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by John Luther on 9 Apr 2013
- Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseriLast observed by Rachel Lawrence on 1 Sep 2023
- solitary vireo sp. Vireo cassinii/solitarius/plumbeusLast observed by Emily Witsberger on 9 Jun 2022
- Loggerhead/Northern Shrike Lanius ludovicianus/borealisLast observed by David Suddjian on 30 Nov 2011
- Tree/Violet-green Swallow Tachycineta bicolor/thalassinaLast observed by Henry Inman on 13 May 2023
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Stephen T Bird on 2 Jan 2022
- Spotted/Eastern Towhee (Rufous-sided Towhee) Pipilo maculatus/erythrophthalmusLast observed by Lisa Thoms on 20 Jul 2021
- Black-throated Gray/Hermit Warbler Setophaga nigrescens/occidentalisLast observed by Mark Robbins on 17 Jun 2017
- Townsend's/Hermit Warbler Setophaga townsendi/occidentalisLast observed by Craig Fosdick on 27 Sep 2019