Wafting pesticides taint far-flung frogs Agricultural pesticides blowing into California's wilderness areas have played a role in mysterious declines in frog populations. G.M. Fellers, et al . Summertime transport of current-use pesticides from California's Central Valley to the Sierra Nevada Mountain Range. Killer skin fungus nails boreal toads.
Parasites make frogs grow extra legs .
Mlot, C. 1997. Water link to frog deformities strengthened . Raloff, J. 1999. Thyroid linked to some frog defects . Common pesticide clobbers amphibians.