- June 11, 2002 Miles Around Community Calendar Music Calendar Arts Ag News Links Why Frogs Croak Winds Take Pesticides To High Sierra Sequoia National Park - For 22 years Sequoia wildlife biologist Harold Werner has plied the backcountry of the big national park watching a sad decline in the frog population. In the Kaweah drainage there just are no more mountain yellow-legged frogs with ...www.valleyvoicenewspaper.com