The green-cheeked parrots, now 7 weeks old, were taken from their aerial nest this month, the South Florida Sun-Sentinel reported Tuesday.
They were recovered Monday, stressed and underweight, when a man abandoned them at a pet shop, said Paul Riello, founder of the Rare Species Conservatory Foundation in Loxahatchee Groves, where biologists are assessing the birds' condition.
The parrots belong to a flock of more than 100 birds of four species native to Mexico that have lived in hollowed-out trees at The Breakers since the 1940s.
Biologists monitoring the nests with special cameras determined the baby parrots were stolen between June 4 and June 9. The thief has not been caught.