Two terms are restricted to breeding species, based on Illinois Department of Natural Resources (IDNR) designations. These are:
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5 The status of the three species of jaegers in Illinois remains unclear, reflecting the paucity of accepted documentations, although the genus as a whole is certainly Regular. Historically, Parasitic has been thought to be by far the most frequent species, but recent evidence suggests that Pomarine and Long-tailed are less exceptional than formerly believed. Bailey (2002) reviews records of jaegers in Illinois, although many of the records he treats have not been accepted as correctly identified by IORC. We treat Parasitic and Pomarine Jaegers as regular as suggested by Bailey (2002), and based on their abundance in the much greater number of records from Lake Michigan in Indiana (Brock 1986). However, in view of the limited number of well-documented reports identified to species, the Committee will continue to review documentations for all jaegers identified to species until a clearer picture of the relative abundance and timing of migration emerges.
6 Eurasian Collared-Doves have spread dramatically through southern and central Illinois since first recorded in 1996, and have established breeding populations known from several locations. The species was introduced into the Bahamas in 1974, and spread from there on its own to Florida by the late 1970's. The Illinois population is the result of the explosive spread of this species through eastern North America. In addition, a population of African Collared-Doves (Streptopelia roseogrisea) has been present in the Joliet area since at least 19xx and dispersers from this population or other escapes have been recorded in most counties of northeastern Illinois. Because of taxonomic uncertainty regarding this form and the fact that most feral populations of African Collared-Doves elsewhere in North America have not proven to be self-sustaining, the Illinois Ornithological Records Committee (IORC) does not consider African Collared-Dove to be a valid member of the established avifauna in Illinois.
7 Broad-billed Hummingbird is represented by an incomplete specimen (ISM 660432, a tail feather) and a series of photographs.
8 Allen's Hummingbird is represented by an incomplete specimen (ISM 660484, two tail feathers) and a series of photographs.
