About Birds of Pennsylvania
The Birds of Pennsylvania lists all of the species on the Official List of Birds of Pennsylvania as determined by the Pennsylvania Ornithological Records Committee. Therefore, some species which in fact have been seen in Pennsylvania are not included, as they have not been substantially documented or the documentation (such as an old museum specimen) has been lost.
To select a species, either start typing the name in the Select Species box or scroll down the box and click on the species desired. Then click on Go.
The information displayed is defined as follows:
Abundance: Refers to the number of this species that a competent birder is likely to find during a typical day of birding in the *proper habitat and time of year*.
	Abundant: Common: Fairly Common: Uncommon: Rare:	100 + per day 26 to 99 per day 6 to 25 per day up to 5 per day, up to 25 per season 1 to 5 per day, up to 5 per season
Occurrence: Refers to how frequently this species occurs in the state (regardless of abundance).
	Regular: Irregular: Casual: Accidental:	Recorded every year Not recorded every year, but at least once every 2 or 3 years 3 or more years between records, but recorded in the state at least ten times ever Recorded fewer than 10 times or not recorded in the last ten years
Seasonal Status; Whether this species is found year-round, migrates, breeds, etc.
	Permanent Resident	Species who breed in the state and do not migrate (or migrate very little) and remain year-round. Ie. Tufted Titmouse, Downy Woodpecker, Wild Turkey.
	Year-round Resident and Migrant	Species who breed in the state, some of whom migrate, but whose northern and southern populations overlap, thereby creating an appearance of permanent status, but individuals in the summer are often different than the winter birds. Ie. Red-tailed Hawk, Purple Finch.
	Migrant and Breeder	Species who breed in the state, but leave the state for winter. Ie. Most warblers
	Migrant and Winter Resident	Species who do not breed in the state, but arrive in the fall and spend the winter. Ie. Common Redpoll, Rough-legged Hawk.
	Migrant	Species who neither breed nor winter here, but just pass through during spring and fall migration. Ie. Connecticut Warbler, Least Sandpiper.
	Out of Range	A species whose normal range does not include Pennsylvania, but somehow shows up here. Ie. Western Kingbird, any hummingbird other than Ruby-throated, Ancient Murrelet
PORC Review Species: Whether this species requires documentation to be accepted as a valid record.
Notable Records: Lists records for this species that appeared in the "Birds of Note" section of Pennsylvania Birds since 1992 and records of species prior to 1992 that have occured fewer than ten times in Pennsylvania. These are records that are unusual — either because the bird is rare or out-of-season. For instance, a Yellow Warbler (common during the summer) would show up in the Birds of Note section if it was found in February. Note: 1992 is the start date, as that is when the Birds of Note section was begun. Prior to then, these types of records were buried in county reports and were very difficult to find and extract.
Species of Special Concern: This is a list of breeding species that the Pennsylvania Game Commission has determined to have some conservation concern. Either the species is very rare or is being subjected to environmental stresses affecting its breeding status in the state. The status is determined solely on the bird's status in Pennsylvania, even if it may be abundant elsewhere.
More info: A link to the Handbook of the Birds of the World web site for life-history and other information about this species. NOTE: Since this is a European site, some of the names and species designations do not agree with the American version.
Photograph: A representative photograph of this species *taken in Pennsylvania*. The caption lists the month and county in which the photo was taken and the name of the photographer.
More photos: A page of additional photos of this species (taken in Pennsylvania) often showing other plumages, male/female/immature, in flight, perched, etc. Some species do not have additional photos.
Range Map: A map of Pennsylvania showing the seasonal occurrence of the species on a county-by-county basis. If the bird occurs in a county (even if only a small corner) the entire county is color-coded appropriately. For instance, in Berks County, Black-throated Green Warblers only breed along the northern boundary (the Kittatiny Ridge), yet the entire county is colored red (for Summer). Rarity dots are placed in the center of the county (not the specific location) regardless of the number and locations of sightings in the county. A red question mark(?) indicates possible or occasional breeding in that county. Summering information (Ie. breeding) is based on the maps in the Second Atlas of Breeding Birds in Pennsylvania, Wilson, Brauning & Mulvihill, 2012.
Seasonal Abundance Graph: This bar chart shows the seasonal occurrence using the abundance definitions cited above. Some of the graphs are split between regions. The regions are defined as shown on ths map.