Reproduction of 2 Closely Related Skinks, Egernia-Modesta and Egernia-Whitii (Lacertilia, Scincidae) in Southeast Queensland

The reproductive cycles of two closely related skinks, Egernia modesta and E, whitii, in southern Queensland are described and compared in sympatric populations. They are very similar, both species produce 1-5 live young about 40 mm long in January-early February. Lizards mature at the end of their second year and litter size is positively related to female body length. Adults grow to 110 mm and appear to live at least 4 years. Two non-hybridising colour morphs of E. whitii were present in the study area and did not associate at random. Possible mechanisms explaining the evolution of these three closely related forms, which can coexist in similar habitats, are discussed.