Lowry Park Zoo officials introduced three female Florida sandhill cranes to three male cranes on Thursday in hopes of sparking breeding activity. Above, a male crane, on the left with a yellow leg marker, tries to join three females. At right, Joe Carrier, a zoo foreman, carries a male crane to the habitat. Instead of extended mating dances and shrieks, the birds soon lost interest and went to their separate corners. Florida sandhill cranes are a threatened species, and captive breeding programs are aimed at stabilizing the state's population.