Efficiency of the cloacal sexing technique in greater rhea chicks (Rhea americana)

Br Poult Sci. 2012;53(3):394-6. doi: 10.1080/00071668.2012.692470.


1. The feasibility and accuracy of the cloacal sexing technique in greater rhea chicks was assessed using chicks of two captive populations of greater rhea in Córdoba, Argentina. 2. A total of 46 greater rhea chicks of 2 to 3 months of age were randomly arranged into three groups and the members of each group were sexed by a different operator. 3. A feather of each chick was plucked for sexing through a molecular method and results were used as controls. 4. Sex was correctly assigned by cloacal inspection in 98% of the cases. Chick manipulation was easily performed and no infections or traumatic lesions were observed a posteriori. 5. Cloacal sexing of rhea chicks up to 3 months of age does not affect animal welfare and should be considered an efficient alternative to molecular methods.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animal Husbandry
  • Animals
  • Argentina
  • Cloaca / anatomy & histology*
  • DNA / analysis
  • Feathers / cytology
  • Female
  • Male
  • Polymerase Chain Reaction / veterinary
  • Rheiformes / anatomy & histology*
  • Sex Determination Analysis / methods*
  • Sex Determination Analysis / veterinary


  • DNA