T. W. Custer C. A. Mitchell 1986 The average clutch size of Caspian Terns nesting in a colony in the Lower Laguna Madre near Laguna Vista, Texas, USA in 1984 was 1.9 eggs per nest. Using the Mayfield method for calculating success, one egg hatched in 84.1% of the nests and 69.8% of the eggs laid hatched. These hatching estimates are as high or higher than estimates from colonies in other areas. application/pdf 10.2307/1521146 en Waterbird Society Hatching success of Caspian terns nesting in the lower Laguna Madre, Texas, USA article