| Table of contents Huitzil vol.18 n.2 Omitlán Jul./Dec. 2017 Original articles | | | | · Temporal changes of waterbirds at the “Valsequillo Reservoir”, a Ramsar site in Puebla, México Berumen Solórzano, Atenea; Maimone Celorio, María Rosa; Villordo Galván, Jorge Agustín; Olivera Ávila, Carlos I.; González Oreja, José Antonio
| | | | · Diet of the Barn Owl (Tyto alba) in Ocoyoacac, Estado de Mexico González-Calderón, Álvaro
| | | Scientific notes | | | | · Range extension of Gray-headed Dove (Leptotila plumbeiceps) in Sierra Gorda Biosphere Reserve of Guanajuato, Mexico Campos-Rodríguez, José Ismael; Sosa-Guerrero, Óscar; Flores-Leyva, Xhail; Yáñez-López, Paola; Jiménez-Guevara, Constanza Danaee
| | | | · First record of partial leucism in the white-fronted goose (Anser albifrons) in Mexico Martínez-Guerrero, José Hugo; Pereda-Solís, Martín Emilio; Sierra-Franco, Daniel
| | | | · The Blue-gray Tanager (Thraupis episcopus) in the state of Guerrero, Mexico Blancas-Calva, Epifanio; Blancas-Hernández, Jean Cristian; Castro-Torreblanca, Marisol; Cano-Nava, Gabriel Antonio
| | | | · Presence and nesting of Anna’s hummingbird Calypte anna in the Comarca Lagunera (Durango and Coahuila), Mexico Valdés-Perezgasga, Francisco
| | | | · First nesting record on the ground of the Mottled Owl (Ciccaba virgata), in Grecia, Costa Rica Astorga Acuña, Juan De Dios
| | | | · Breeding of Red-billed Tropicbird (Phaethon aethereus) in Clarion Island, Mexico González-Zamora, Diego Adolfo; Angulo-Castellanos, Luis Felipe; Hernández-Vázquez, Salvador; Almanza-Rodríguez, Humberto; Piña-Ortiz, Alberto; Castillo-Guerrero, José Alfredo
| | | | · Records and breeding sites of the Least Grebe (Tachybaptus dominicus) in Zacatecas Pérez-Valadez, Noé
| | | | · First records of several bird species for Zacatecas, Mexico Pérez-Arteaga, Alejandro; Zalapa, Silvia S.; Guerrero, Sergio; Cruz-Sáenz, Daniel
| | | Original articles | | | | · Birds of Puerto Interior Turístico Jocotepec in Lake Chapala, Jalisco, México Cuevas, J. Carlo; Íñiguez-Dávalos, Luis Ignacio
| | | | · Richness and diversity patterns of birds in urban green areas in the center of San Salvador, El Salvador Vides-Hernández, Gabriel L.; Velado-Cano, Maryory A.; Pablo-Cea, José D.; Carmona-Galindo, Víctor D.
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