The California condor repopulation was successful because of captive breeding programs. In these captive breeding techniques eggs were removed when they were laid, which in turn caused the captive condors to lay a second and sometimes third egg. The extra eggs were incubated and baby chicks were raised by caretakers using a hand puppet shaped like a parent condor head. The puppet prevented the young condors from imprinting on people. Condor chicks that were not raised by puppets, were raised by their parent birds. As a result of this technique, condor populations have increased dramatically from 22 birds in 1987 to more than 270 birds in 2005.
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