Diurnal activity patterns of Black-Necked Stilts (<em>Himantopus mexicanus</em>) during the non-breeding season in the eastern Caribbean

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Laura Navarrete
Blake Grisham
Maria Kalyvaki
E. Kathleen McGaughey
Krista Mougey
Ben Skipper
Gad Perry
Clint Boal

Abstract: Diurnal activity patterns of resident Black-necked Stilts (Himantopus mexicanus) were observed on Guana Island, British Virgin Islands, during October 2010. Stilts were principally engaged in foraging and idle behaviors. The amount of time engaged in particular behaviors was relatively constant throughout the day, except during mid-afternoon when idleness increased and foraging decreased, with a subsequent increase in foraging in the evening. We speculate that the increase in foraging activity was a result of changing prey activity.


Keywords: activity pattern, behavior, Black-necked Stilt, Guana Island, Himantopus mexicanus, wetlands


Resumen: Patrones de actividad diurna de Himantopus mexicanus durante la temporada no reproductiva en las antillas menores- Los patrones de actividad diurna de individuos residentes de Himantopus mexicanus fueron observados en la isla de Guana, Islas Vírgenes Británicas, durante octubre de 2010. Los individuos estaban ocupados principalmente en conductas de forrajeo e inactivos. La cantidad de tiempo dedicado a conductas particulares fue relativamente constante a lo largo del día, excepto a media tarde cuando se incrementó el descanso y disminuyó el forrajeo con un subsecuente incremento de este último al atardecer. Especulamos que este incremento en la actividad de forrajeo fue el resultado de un cambio en la actividad de las presas.


Palabras clave: conducta, isla de Guana, Himantopus mexicanus, humedales, patrones de actividad


Résumé: Rythmes d’activité diurne de l’échasse d’amérique (Himantopus mexicanus) en dehors de la saison de reproduction dans l’est de la caraïbe- Les rythmes d’activité diurne des Échasses d’Amérique (Himantopus mexicanus) sédentaires ont été observés sur Guana Island, aux Îles Vierges britanniques, en octobre 2010. La recherche de nourriture et le repos constituaient les principaux comportements des échasses. La durée consacrée à des comportements particuliers était relativement constante au cours de la journée, sauf en milieu d’après-midi où les durées de repos augmentaient et celles de recherche de nourriture diminuaient, suivies par une nouvelle augmentation du temps consacré à la recherche de nourriture dans la soirée. L’augmentation de l’activité de recherche de nourriture pourrait être le résultat de l’évolution des activités des proies.


Mots clés: comportement, Échasse d’Amérique, Guana Island, Himantopus mexicanus, rythme d’activité, zones
humides

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References

ALTMANN, J. 1974. Observational study of behavior: sampling methods. Behaviour 48:227–267.

BURGER, J., M. A. HOWE, D. C. HAHN, AND J. CHASE. 1977. Effects of tide cycles on habitat selection and habitat partitioning by migrant shorebirds. Auk 94:743–758.

CONNORS, P. G., J. P. MYERS, C. S. W. CONNORS, AND F. A. PITELKA. 1981. Interhabitat movements by Sanderlings in relation to foraging profitability and the tidal cycle. Auk 98:49–64.

CULLEN, S. A. 1994. Black-necked Stilt foraging site selection and behavior in Puerto Rico. Wilson Bulletin 106:508–513.

DWYER, T. J. 1975. Time budget of breeding Gadwalls. Wilson Bulletin 87:335–343.

ETTINGER, A. O., AND R. KING. 1980. Time and energy budgets of the Willow Flycatcher (Empidonax traillii) during the breeding season. Auk 97:533–546.

EVANS, P. R. 1976. Energy balance and optimal foraging strategies in shorebirds: some implications for their distributions and movements in the non-breeding season. Ardea 64:117–139.

HAMILTON, R. 1975. Comparative behavior of the American Avocet and the Black-necked Stilt (Recurvirostridae). Ornithological Monographs 17:1–98.

KING, J. R. 1974. Seasonal allocation of time and energy resources of birds. Pages 4–70 in Avian energetics (R. A. Paynter, Jr., ed.). Publications of the Nuttall Ornithological Club no. 15. Cambridge, MA.

LAZELL, J. 2005. Island: fact and theory in nature. University of California Press, Berkeley, CA.

NATIONAL OCEANOGRAPHIC AND ATMOSPHERIC ADMINISTRATION. 2011. Center for Operational Oceanographic Products and Services. Tidesand currents.noaa.gov.

ROBINSON, J. A., J. M. REED, J. P. SKORUPA, AND L. W. ORING. 1999. Black-necked Stilt (Himan-topus mexicanus). In The birds of North America (A. Poole, ed.), no. 449. Cornell Lab of Ornithology, Ithaca, NY.

SORDAHL, T. A. 1990. Sexual differences in antipredator behavior of breeding American Avocets and Black-necked stilts. Condor 92:530–532.

SORDAHL, T. A. 1996. Breeding biology of the American Avocet and Black-necked Stilts in northern Utah. Southwestern Naturalist 41:348–354.

VERNER, J. 1965. Time budget of the male long-billed marsh wren during the breeding season. Condor 67:125–139.

WILEY, J. W. 2000. A bibliography of ornithology in the West Indies. Proceedings of the Western Foundation of Vertebrate Zoology, no 7, Camarillo, CA.

WILSON, W. H. 1990. Relationship between prey abundance and foraging site selection by Semipalmated Sandpipers on a Bay of Fundy mudflat. Journal of Field Ornithology 61:9–19.

ZAR, J. H. 2010. Biostatistical analysis. 5th edn. Pearson Prentice Hall, Upper Saddle River, NJ.