Pair of California condor eggs mark start of breeding season

SAN DIEGO - Keepers at the San Diego Zoo Safari Park are keeping a close watch on a pair of California condor eggs, marking the start of the breeding season for the endangered species.

One of the eggs, laid Feb. 13, was tested today, and it showed a 14 percent weight loss from its previous check.

``All eggs lose weight as they develop,'' said Debbie Marlow, senior keeper at the park. ``It seems counterintuitive because as the chick grows, you would expect there to be a weight gain, but egg shells are porous and moisture is lost through the shell by evaporation during the incubation process.''...