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The colonial Tricolored Blackbird is of extreme conservation concern throughout its range. In California, where >99% of the population resides, it is designated as a State threatened species. In Mexico, the species no longer nests in most of its historical range and annual population estimates since 2007 have averaged ~400 birds. Since 2016, the species has been found nesting only within 20 km of the California border. Terra Peninsular was awarded $10,000 to conduct intensive surveys and draft a conservation plan for the species in Mexico. The plan will be based upon the species historical record; the results of a 2019 survey of all known and potential nesting sites; and an investigation of land ownership, land use, zoning laws, water rights, and restoration and easement potential relevant to the conservation of the species. The 2019 survey will include aerial reconnaissance of selected areas particularly important for the species (encompassing >120,000 hectares) and multiple visits to active sites throughout the nesting season. As needed, drone technology will be used to gain insight into activities in areas difficult to access. Public use materials will be prepared that summarize the history, distribution, threats, and conservation of the Tricolored Blackbird in Mexico.
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