KEY NORTH AMERICAN MIGRATION SITES FOR
Red Knots & Semipalmated Sandpipers

Marismas Nacionales

Country: Mexico

Region: Nayarit,

Site: Marismas Nacionales

Species/Sub-species: REKN-roselaari

Total biogeographic population: 21,770

Count Method: Maximum day count

Count: 2,0251,2

% biogeographic pop. at site: 9.30

Season (primarily): Winter

Site recognition: WHSRN Ramsar IBA

Site recognition (other): Natural Protected Areas, Biosphere Reserve

Site description: Using the Ramsar Classification System for Wetland Type, the site habitat characteristics are coastal (intertidal mud including muddy flats and shallow waters).

Known threats: The threat of exploitation of renewable resources is high due to large scale/industrial fishing. The threat from agriculture due to industrial farms is also high. Wetland draining (in the San Blas Zone) poses a threat and altered salinity in San Blas, from Canal de Cuautla, Estero de San Cristobal poses a high threat. Infrastructure such as roads, trains, bridges (without culverts) is also a threat to the site. The threat of pollution and contamination from agricultural sources, domestic sources, sediment, sewage, and solid waste is high. Lastly, the physical alteration of the site due to storms and flooding (hurricanes) and sedimentation (from the higher elevation watershed) is also high.3

Notes: The site boundaries include Las Garzas, Nayarit, and follow the IBA boundaries. It is confirmed that REKN-roselaari uses the site. Additionally, it is presumed that the mid-continental population of REKN-rufa could use the site.

Sources: 1eBird 2015 (David Molina 2/20/2010) 2Pacific Flyway Shorebird Survey and the Migratory Shorebird Project http://migratoryshorebirdproject.org/index.php?page=map 3WHSRN Site Assessment Tool (SAT) 2011