Lishman and No! • MAGELLANIC PLOVER HABITAT SELECTION 
495 
a large geographic area. The species also has low 
fecundity (<1 fledgling/adult female/nest at¬ 
tempt). Further demographic research should be 
conducted to estimate annual nest success (e.g., 
with marked populations to learn if birds renest >. 
and both juvenile and adult survivorship. These 
data can be supplemented with broader geograph¬ 
ic surveys to estimate population si/.e and 
stability. Identifying the characteristics that pro¬ 
mote high abundance at particular lakes, and 
protecting these sites will be critically important 
to this species' conservation. 
ACKNOWLEDGMENTS 
We thank the many individuals who provided field and 
logistic support in Santa Cruz, Argentina: Santiago Imberti, 
Martina McNamara, German Montero, Rita Lope/. Karen 
Clark, Monica Sejas. Sebastian Alvarado, Marina Ganehc- 
gui. Rosario Lovcra, William Lishman. Martin Vindel. 
Leslie Najgcbauer. and Franco Pa/.. We arc grateful for 
private land access provided on the following ranches 
(csrancias in Spanish, or Ea,): Ea. Killik Aikc Norte, La. 
t.os Po/os. Ea. La Angelina, Ea. Tres de Enero. Ea. Otern 
Atke, Ea. Rupai Pacha. Ea. Morro Chico. Ha. Glen Cross, 
Ea. Los Luiscs, Ea. El Bosque. Ea. La Martina. Ea. La 
Leona, and Ea. Don Raul. We thunk those who provided 
suggestions lor early drafts and data analysis: Joe Noceru. 
Unit Nguyen. Koji Tominagu. Ken Abraham, Jim Schaefer. 
Santiago Imberti, Silvia Ferrari. Carlos Albrieu. and Anne 
Corkery. We also thank .1. R. Jehl Jr. and C. D Duncan for 
comments and suggestions on this manuscript. This study 
was made possible by Trent University, Universidud 
National de la Patagonia Austral, and the Natural Science 
and Engineering Research Council of Canada. 
LITERATURE CITED 
BlRDLlFF INTERNATIONAL. 2012 Species fuctshect: Pluvia- 
nellus social is. BirdLife International. Cambridge, 
United Kingdom. 
Bi RNHAM. K. P. AND D. R. ANDHRSON, 2002. Model search 
and multimodal inference: a practical information- 
theoretic approach. Second Edition. Springer, New 
York, USA. 
Colwei u M. 2010. Shorcbird ecology, conservation, and 
management. University of California Press. Berkeley. 
USA. 
Ferrari, S., S. Imberti. and C. Albriei 2003. Magellanic 
Plovers Pluviancllus social is in southern Santa Cm/ 
Province. Argentina. Wader Study Group Bulletin 101/ 
102:70-76. 
Ferrari, s.. c. albrieu. S. Imberti, and C. Lishman. 
2008 Estado actual del conocimicnto de un chorlo 
endemico de la Patagonia austral, cl Chorlito Len- 
iciento (Pluviancllus socialist: reuniendo las piezus de 
un rompccabczas. Ornitologia Neotropical 19S:433- 
443. 
Grail, W. D. 1973. Possible functions of head markings in 
Charadriinae. Wilson Bulletin 85:60-70. 
HOSMER, D. W. and S. Lemeshow. 2000. Applied logistic 
regression. John Wiley and Sons Inc.. New York, 
USA. 
IMBERTI, S. 2003. Notes oil the distribution and natural 
history of some birds in Santa Cruz and Tierra del 
Fucgo provinces. Patagonia, Argentina. Cotinga 
19:15-24. 
Jehl. J. R. 1975. Pluviancllus socialis: biology, ecology 
and relationships of an enigmatic Patagonian shore- 
bird. Transactions of die San Diego Society of Natural 
History 18:31-72. 
Johnson. A. W. 1964. Notes on Mitchell’s Plover, 
Phegornis mitchelli. Ibis 106:249-251. 
Johnson. D. H. 1979. Estimating nest success: the Mayfield 
Method and an alternative. Auk 96:651-661. 
Long, P. R , S. Zefama, R. I I. Fkrench-Constant, and T. 
SzEkely. 2008. Estimating the population size of an 
endangered shorcbird, the Madagascar Plover, using 
a habitat suitability model. Animal Conservation 
11:118-127. 
MaBEE, T. J. 1997, Using eggshell evidence to determine 
nest fate of shore birds. Wilson Bulletin 109:307-313. 
Mayfield. H. 1961. Nesting success calculated from 
exposure. Wilson Bulletin 73:255-261. 
McCULLAGH. P and S. R. SbARLE. 2000. Generalized 
linear and mixed models. Wiley-lnterscience. New 
York, USA. 
Ml LTOI-TE. !L. T. PlERSMA. H- BOYD, B. McCaFFERY. B. 
CrANTNER, V. V. GOLOVNYUK. K. GRAHAM, C. L. 
Gratto-Trevor, R. I. G. Morrison, E. Nol, H.-U. 
Rosner. D. Schamel, H. Sckekkerman, M. Y. 
Soloviev. P. S. Tomkovic h. D. Tracy, I. Tulp, 
and L. Wennerbfrg. 2007. A circumpolar review of 
the effects of climate variation on the breeding 
ecology of Arctic shorebirds. Greenland Monographs 
59. 
Nguyen, L. p„ E. Nol, and K. Abraham. 2003. Nest 
success and habitat selection of the Semipalmated 
Plover on Akimiski Island. Nunavut. Wilson Bulletin 
115:285-291. 
Nguyen, L. P„ E. Nol, and K. Abraham. 2007. Using 
digital photographs to evaluate the effectiveness of 
egg crypsis. Journal of Wildlife Management 71: 
2084-2089 
PlERSMA. T„ P. WiERSMA, and J. VAN GiLS. 1997. The 
many unknowns about plovers and sandpipers of the 
world: introduction to a wealth of research opportu¬ 
nities highly relevant lor shorcbird conservation. 
Wader Study Group Bulletin 82:23-33. 
Qi iron. R. and E. DRACO, 1999. The environmental state of 
Argentinean lakes: an overview. Lakes and Reservoirs: 
Research and Management 4:55-64. 
R. Development Core Team. 2010. R: a language and 
environment for statistical computing. Vienna, Aus¬ 
tria. 
Rliz-Guerra, C.. Y. Cifuentes-Sarmiento, C. E. Her- 
NANDEZ-CORREDOR, R. JOHNSTON-GONZAJLEZ, AND L. 
F. Castillo-Cortes. 2008. Reproduction de dos 
subespecies del Chorlito Piguigrueso (Charadrius 
wilsonia) en costas Colombianas. Ornitologia Co- 
lombiana 6:15-23. 
