Nest characteristics of the Clapper Rail in coastal Georgia

2003 
The nesting habitat of the Clapper Rail (Rallus longirostris) is not well studied in the southeastern United States. We documented Clapper Rail nest characteristics and surrounding habitats near Brunswick on the Georgia coast. Of 159 nests found, only 29 were active. Although some nests may have been abandoned or never used, many could have been depredated. Nests were constructed farther away from tidal influences than in those populations studied in the mid-Atlantic region of the United States. Clapper Rails also tended to nest near tidal pools as frequently as tidal creeks, contrasting with other Atlantic coast studies. The greater tidal amplitude of Brunswick as compared to the mid-Atlantic coast may explain this finding. Tidal-creek nests were found farther away from, and were associated with taller vegetation near the banks of, a water source than tidal-pool nests. While nest placement differed based on habitat characteristics in this study, nest-structure morphometrics were similar between tidal-creek and tidal-pool habitats and were consistent with those found in other regions of the country. SINOPSIS. Caracteristicas de los nidos de Rallus longirostris en la costa de Georgia El habitat de anidamiento de Rallus longirostris no ha sido bien estudiado en el sureste de los Estados Unidos. Documentamos las caracteisticas del habitat de anidamiento y de los alrededores de esta especie en Brunswich, Georgia. De 159 nidos encontrados solo 29 estaban activos. Aunque algunos de estos nidos muy bien pudieron ser abandonados o nunca utilizados, muchos de estos pudieron haber sido depredados. Los nidos fueron constuidos mas lejos del efecto de las mareas que los estudiados en la region media del Atlantico. Las aves tendieron a anidar cerca de charcas formadas por las mareas y de arroyos tambien formados por esta, lo que contrasta con los estudios hechos en el Atlantico. La mayor amplitud de las mareas en Bruanswick muy bien pudieran ser la causa de las diferencias. Los nidos en arroyos formados por las mareas se encontraron mas lejos y estuvieron asociados con vegetacion de mayor altura que quellos encontrados en las charcas de mareas. Aunque la localizacion del nido vaio ´ con el habitat, la morfometria estructural del nido resultosimilar en ambos habitats y con otros encontrados en otras regiones del pais.
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