| intersexuality and the cricket frog decline: historic and geographic trends. | exposure to anthropogenic endocrine disruptors has been listed as one of several potential causes of amphibian declines in recent years. we examined gonads of 814 cricket frogs (acris crepitans) collected in illinois and deposited in museum collections to elucidate relationships between the decline of this species in illinois and the spatial and temporal distribution of individuals with intersex gonads. compared with the preorganochlorine era studied (1852-1929), the percentage of intersex crick ... | 2005 | 15743712 |