Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 81 to >300
Comments: This species is represented by hundreds of collection sites throughout the historical range in the United States and by well over 100 sites in Mexico (Prices 1990). Many historically occupied sites still support populations (e.g., Hammerson 1999).
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