An International Journal of Neotropical Ornithology published by the NEOTROPICAL ORNITHOLOGICAL SOCIETY __________________________________________________________________________ Volume 20 2009 No. 1 __________________________________________________________________________ CONTENTS EDITORS NOTE. André-A. Weller ......................................................................................................... i ARTICLES THE CURRENT STATE OF KNOWLEDGE ON MOLT AND PLUMAGE SEQUENCES IN SELECTED NEOTROPICAL BIRD FAMILIES. A REVIEW. Thomas B. Ryder & Jared D. Wolfe. .............................................................................................................................. 1 VARIATION IN THE CRANIAL MORPHOMETRY OF MAGELLANIC PENGUIN (SPHENISCUS MAGELLANICUS). Carolina Acosta Hospitaleche. ................................................. 19 PATRÓN DE ASISTENCIA A LA COLONIA EN EL PINGÜINO DE MAGALLANES (SPHENISCUS MAGELLANICUS) DE ISLA MARTILLO, CANAL BEAGLE, TIERRA DEL FUEGO: IMPLICANCIAS PARA MINIMIZAR EL DISTURBIO HUMANO. Gabriela Scioscia, Andrea Raya Rey, Marco Favero, & Adrián Schiavini. .................................................. 27 PRIORITIES FOR THE CONSERVATION OF AN ENDANGERED GRASSLAND BIRD: CLUES FROM ITS NESTING BIOLOGY. Sergio M. Zalba, Rocío Sánchez, & Natalia C. Cozzani. .................................................................................................................................................. 35 RESPUESTAS DE UN ENSAMBLE DE AVES A LA REMOCIÓN MANUAL DE ARBUSTOS EN UN BOSQUE SUBTROPICAL SEMIÁRIDO DEL CHACO ARGENTINO. Mariano Codesido, Andrea Alejandra Drozd, Patrick Anthony Gado, & David Bilenca. ............... 47 BREEDING BIOLOGY OF KELP GULLS (LARUS DOMINICANUS) ON DESERTA ISLAND, SOUTHERN BRAZIL. Lia J. Prellvitz, Raissa I Hogan, & Carolus M. Vooren. ............... 61 Continued on outside back cover