NANCEE E. LEWIS / Union-Tribune
Volunteers canoe through the Tijuana Estuary in 1999, part of an effort to count numbers of local clapper rail, an endangered bird.
Rain forests are often said to be the planet’s lungs. If that’s so, then wetlands are Earth’s kidneys, and Joy Zedler is the doctor on call.
These days, it’s a long-distance call.