Mexican species

       
Black Tern (Chlidonias niger)
Mexico The Mexican Republic Aguascalientes Baja California Guadalupe Baja California Sur Campeche Chiapas Chihuahua Coahuila Colima Revillagigedos Revillagigedos Ciudad de México Durango Guanajuato Guerrero Hidalgo Jalisco México Michoacán Morelos Nayarit Tres Marías Nuevo León Oaxaca Puebla Querétaro Quintana Roo Cozumel San Luis Potosí Sinaloa Sonora Tabasco Tamaulipas Tlaxcala Veracruz Yucatán Zacatecas
Subspecies Hide subspecies
niger niger (Eurasian) Breeds inland Europe (except British Isles and northern Scandinavia) to south-central Russia and northwestern Mongolia; winters to coastal Senegal and northern Namibia.
surinamensis surinamensis (American) Breeds inland west-central Northwest Territories eastward to Maritime Provinces (northwestern to southeastern Canada) southward to central California and Maine; winters coastal Mexico to Venezuela.
Endemic status
Sound Guide x2x
Comment Subspecies specifics of juveniles: American, surinamensis, shows wing-breast spot broader but less well-defined edges, has a diffuse darkish flank and shows little contrast between tail and upper tail coverts and back. And also shows more contrast on dark head markings with the ear patches being darker than the crown. European birds, niger, often shows well-marked pale borders to upper tail coverts and scapulars.
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