ARTICLES

Status of the Humboldt Penguin in Peru, 1999-2000. Rosana Paredes, Carlos B. Zavalaga, Gabriella Battistini, Patricia Majluf, and Patricia McGill, pages 129–138.

Aspects of Breeding, Molt, Measurements and Population Trend of Hartlaub’s Gull in Western Cape, South Africa. R. J. M. Crawford and L. G. Underhill, pages 139–149.

Predation on Adult Piping Plovers at Predator Exclosure Cages. Robert K. Murphy, Isabelle M. G. Michaud, David R. C. Prescott, Jacob S. Ivan, Beverly J. Anderson, and Marlanea L. French-Pombier, pages 150–155.

Predator Exclusion Methods for Managing Endangered Shorebirds: Are Two Barriers Better than One?. Robert K. Murphy1, Raymond J. Greenwood2, Jacob S. Ivan3, and Karen A. Smith4, pages 156–159.

Intraspecific Aggression by Roseate Tern Adults on Chicks in a Tropical Colony. Jaime A. Ramos, pages 160–165.

Seeds in the Diet of the White-rumped Sandpiper in Argentina. Diego Montalti1, Ana M. Arambarri2, Guillermo E. Soave1, Carlos A. Darrieu1, and Anibal R. Camperi1, pages 166–168.

Re-evaluation of Historical Rockhopper Penguin Population Data in the Falkland Islands. Klemens Pütz, Andrea P. Clausen, Nic Huin, and John P. Croxall, pages 169–175.

Breeding Habitat Requirements of the Imperial Cormorant and Rock Shag in Central Patagonia, Argentina. Gabriel Punta, Pablo Yorio, José Saravia, and Pablo García Borboroglu, pages 176–183.

Foraging Behavior and Feeding Locations of Imperial Cormorants and Rock Shags Breeding Sympatrically in Patagonia, Argentina. Alexandra Sapoznikow and Flavio Quintana, pages 184–191.

Nocturnal Behavior of American Avocets in Playa Wetlands on the Southern High Plains of Texas, USA. Richard M. Kostecke1 and Loren M. Smith, pages 192–195.

Low Mitochondrial DNA Variation in Double-crested Cormorants in Eastern North America. Juliann L. Waits, Michael L. Avery, Mark E. Tobin, and Paul L. Leberg, pages 196–200.

The Extent of Great Crested Grebe Predation on Bleak in Lake Como, Italy. Adriano Martinoli, Alessandra Gagliardi, Damiano G. Preatoni, Silvia Di Martino, Luc A. Wauters, and Guido Tosi, pages 201–208.

The Role of Competition and Local Habitat Conditions for Determining Occupancy Patterns in Grebes. Erik E. Osnas, pages 209–216.

Relationships between the Red Fox and Waterbirds in the Ebro Delta Natural Park, N.E. Spain. Jordi Ruiz-Olmo, Ferran Blanch, and Francesc Vidal, pages 217–225.

Factors Affecting Waterbird Abundance and Species Richness in an Increasingly Urbanized Area of the Tagus Estuary in Portugal. Susana Rosa, Jorge M. Palmeirim, and Francisco Moreira, pages 226–232.

Response of Waterbirds to Number of Wetlands in the Prairie Pothole Region of North Dakota, U.S.A.. Neal D. Niemuth and John W. Solberg , pages 233–238.

Variation in Size and Location of Wading Bird Colonies in the Upper St. Johns River Basin, Florida, USA. Judith C. Bryan, Steven J. Miller, Camille S. Yates, and Marc Minno, pages 239–251.