Report on captive hatches of California condors (Gymnogyps californianus): 1983–1990

The California condor (Gymnogyps californianus) recovery plan entails increasing the reproductive rate via replacement-clutch manipulation and artificial incubation of eggs. During the period from 1983 to 1990, 37 eggs have been artificially incubated; 32 of these were known to be fertile and 28 hatched (fertility: 86.5%; hatchability: 87.5%).