Study sites and years.

Survey years for parks and ponds included in a field study of presence/absence of California Red-legged Frogs (CRLF; Rana draytonii) and American Bullfrogs (BF; Lithobates catesbeianus) in Central California. Includes presence of large anuran species, either R. draytonii (CRLF), L. catesbeianus (BF), both present (both), or neither (none).

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