Additional Species Information
Species names and listed order follow the Clements Checklist 2023, including subsequent supplements. For additional information on abundance and seasonal occurrence of species within the Sacramento Checklist Area, please refer to the Checklist of the Birds of Yolo County, California (Rev. 2019) and A Field Checklist for Birds of the Cosumnes River Preserve, Sacramento County, California (Third Revision-2001).
Documented reports of species marked with an asterisk or designated as "lucky to find" on the graphs, species on the list of rarities, species found out of season, species nesting that are not yet confirmed nesters in this area, and species not mentioned in this checklist should be submitted to the appropriate North American Birds county editor. You can find a list of county editors in Northern California at fog.ccsf.edu/~jmorlan/afn.html#nocal.
Rare Species
not included in checklist
Recorded Ten or More Times between 2003 and 2023
Common Nighthawk
Black Swift
Pacific Golden-Plover
Stilt Sandpiper
Sabine's Gull
Franklin's Gull
Red-throated Loon
Yellow-bellied Sapsucker
Vermilion Flycatcher
Mountain Chickadee
Sage Thrasher
Townsend's Solitaire
Cassin's Finch
Clay-colored Sparrow
Black-throated Sparrow
Northern Waterthrush
Black-and-white Warbler
Hooded Warbler
American Redstart
Northern Parula
Palm Warbler
Exotic Species
For the purpose of the Checklist of Birds in the Sacramento Region exotic species are non-native species that have not yet become naturalized or reached provisional status.
Naturalized species are species that are non-native, self-sustaining, breeding in the wild, persisting for many years, and not maintained through ongoing releases. Naturalized species are included on the checklist. Examples of naturalized species included on the checklist are European Starling, House Sparrow, and Eurasian Collared Dove.
Provisional exotic species are non-native species that are breeding in the wild, self-propagating, and have persisted for multiple years, but are not yet thought to be naturalized. As of 2023 the Mute Swan is a Provisional Species in the Sacramento Area. It is included on the checklist.
Escapee exotic species are non-native species that are known or suspected to be escaped or released, including those that have bred but don't yet fulfill the criteria for Provisional. The following Escaped Species have been recorded in the Sacramento Area at least ten times between 2003 and 2023: Graylag Goose, Egyptian Goose, Muscovy Duck, Mandarin Duck, Indian Peafowl. These birds are not included in the checklist.