Although infertility and egg loss are the primary causes for reproductive failure among captive flamingos, based on available literature, specific problems appear to be variable. Observations from an ongoing research project at Rotterdam Zoo suggest a number of factors that could influence captive flamingo reproductive success and management strategies. At this time many observations in zoos are anecdotal; long-term intracolony studies need to be carried out, and intercolony comparisons made to gain more understanding of these problems and how they are influenced by colony dynamics.