Pastizales de Janos y Ascensión

Location

Chihuahua, Mexico

Category

Regional

Basis for Designation

300 Mountain Plovers (2.4% of the world population)
3,000 Long-billed Curlews (2.4 – 5.5% of the estimated population)

Size

543,717 hectares (1,343,554 acres)

Date Designated

August 2010

Site Owner

Comisión Nacional de Áreas Naturales Protegidas (CONANP)

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Overview

Pastizales de Janos y Ascensión, located in northern Mexico, was declared a Biosphere Reserve in December 2009, bringing more than 544,000 hectares (1,300,000 million acres) of critical grassland habitat under federal protection. The area is also recognized as an Important Bird Area (AICA Janos – Nuevo Casas Grandes) due to the significant number and diversity of migratory birds it supports. High-priority grassland-associated shorebirds within this WHSRN Site of Regional Importance include 300 Mountain Plovers (Charadrius montanus), which is 2.4% of the world population; and 3,000 Long-billed Curlews (Numenius americanus), or 2.4 – 5.5% of the estimated population. Both are considered “Species of High Concern” by the U.S. Shorebird Conservation Plan. Additional shorebird species of conservation concern that rely on these grasslands are Snowy Plover (Charadrius nivosus) and Upland Sandpiper (Bartramia longicauda).