DePew & Towle (1979), Kraeuter & Haven (1970), Kraeuter & Wolf (1974)†, Mantel & Farmer (1983)†, Peery et al. (1990), van Montfrans et al. (1990), Wrona et al. (1995)†
Entries marked with † represent indirect references to location through citation. Entries marked with ‡ represent potential inhabitants inferred from species ranges.