Poza de la Arenilla is an artificial wetland created by the construction of two rocks in the southern part of the district of La Punta, which are approximately 18.2 ha. The shorebirds belong in their entirety to the Order Charadriiformes; these belong to the families: Haematopodidae, Charadriidae and Scolopacidae. In order to determine the temporal variation of shorebirds, a study was carried out between January 2013 and September 2016, using the transect methodology; the route was 1,115 km, passing through an urban area on the left side of the transect and a coastal marine area on the right side. For the analysis of the data, the PRIMER v6.0 software was used to determine the seasonal variation of the birds in each season (Summer, Fall, Winter, Spring) and to compare results between seasons. There were 19 species belonging to 3 families of the order Charadriiformes. The species that presented the most numerous populations were Calidris alba "sanderling" (256), Numenius phaeopus "whimbrel" (89), Calidris pusilla "semipalmated sandpiper" (66) and Charadrius semipalmatus "semipalmated plover" (114). The family with the richest shorebirds for this wetland was Scolopacidae with 14 species. The year 2013 presents the greatest species richness (14), with abundance of Charadrius nivosus "snowy plover" and Phalaropus tricolor "Wilson's phalarope".

Los humedales del Callao cuentan con una variedad de organismos de fauna y flora acuática. Estos oasis chalacos (Área de Conservación Regional Humedales de Ventanilla (ACR), Parque Ecológico Municipal “El Mirador” y El Humedal Costero Poza de la Arenilla-HCPA) cuentan con un gran atractivo para el turismo y la observación de aves. Sin embargo, solo se cuenta con un humedal con categoría de protección: Área de Conservación Regional Humedales de Ventanilla (ACRHV). Si bien es cierto, los otros dos humedales no cuentan con una categoría de protección, existen iniciativas para su conservación. Se identificaron las especies de aves que albergan estos humedales y se contó con información precisa de la avifauna residente y migratoria. Se calculó el índice de similitud de Jaccard para 1) determinar la similitud en la composición de especies entre los tres humedales: ACRHV, El Mirador y HCPA, y 2) calcular la similitud entre las mismas categorías de estacionalidad para ACRHV, El Mirador y HCPA. Las familias con mayor riqueza fueron Scolopacidae (22) y Laridae (14). En cuanto a la estacionalidad, la principal diferencia observada entre los humedales ubicados en el distrito de Ventanilla (ACRHV y El Mirador) y La Punta (HCPA) es en especies residentes (Re), con 55 especies para Ventanilla y 24 especies para La Punta. En relación a la similitud según estacionalidad, la mayor similitud de Jaccard la obtuvieron las especies migratorias boreales, con casi 59% especies compartidas entre el distrito de Ventanilla y La Punta. Los resultados de este estudio muestran la estrecha relación que existe entre los tres humedales del Callao, siendo hábitats compartidos para muchas especies de aves. Se requiere impulsar acciones para la gestión de estos ecosistemas a nivel regional, tales como la creación de un corredor biológico importante en la zona centro de Lima y Callao.

The Coastal Wetland "Poza de la Arenilla" (HCPA) located in the district of La Punta (Callao) receives each year a significant group of shorebirds of which no detailed information is available. The present study aims to define the spatial distribution of shorebirds species in the wetland between January 2013 and December 2015 to determine the composition in each of the identified areas. The areas defined for this habitat are: Boulders 1 (CR1), Channel, Chanel wall (MC), Shore, Sandstone shore 1 (OA1), Sandstone, Roquedal 1 (R1), Water mirror 1 (EA1), Roquedal 2 (R2), Water mirror 2 (EA2) and Sandstone shore 2 (OA2). Were recorded 2 species for the family Haematopopidae, 4 for Charadriidae and 13 for Scolopacidae.The species that contributed the most to the habitats and seasons were: Actitis macularius (Linnaeus, 1766), representing the zone Shore (97.59%), and the season spring (27.40%); Charadrius semipalmatus (Bonaparte, 1825), in O.A.1 (36.13%) and summer (25.07%), Arenaria interpres (Linnaeus, 1758), in EA2 (62.81%) and autumn (24.81%). Autumn was the season with the lowest abundance compared to other seasons, this due to not being in the migratory shorebird migration season mostly migrating to the family Charadriidae and Scolopacidae.

The parks and gardens present in Lima City form important urban ecosystems which given the wealth of biological species can be considered as wildlife refuges as well as being part of observation circuits for urban birds. El Parque de las Leyendas stands out for presenting a large number of wild bird species, 45 recorded during the years 2016 to 2018. The family's with high levels of representation are Thraupidae (13%), Tyrannidae (11%), Columbidae (9%) and Ardeidae (9%). 26 species are coastal birds (Zc); 17 species are from the sierra (mountain) zone (Zsi); 31 species from the jungle zone (Zse); and 36 species are cosmopolitan (Zi). Among the species that stand out most is the White-faced Whistling-Duck Dendrocyna viduata (Linnaeus, 1766) "Divagant" species (V) for the country, Purple Gallinule Porphyrio martinica (Linnaeus, 1766) vagrant species for the Parque de las Leyendas, (V) and Eastern Kingbird Tyrannus tyrannus (Linnaeus, 1758), species vagrant for the PLL. Information is presented on the diversity of wild birds, seasonality, abundance and state of conservation.