Rio Juqui, Amazonas, Brazil Rio Juquiazinho, São Paulo, Brazil Rio Juramento, Salta, Argentina Rio Juruá, Amazonas, Brazil Rio Juruá, Amazonas, Brazil Rio Juruaçu, Pará, Brazil Rio Juruena, Mato Grosso, Brazil Rio Juruena, Mato Grosso, Brazil Río Justino, San Luis Potosí, Mexico Rio Jutaí, Amazonas, Brazil Río Kilate, Veracruz, Mexico Río Kilate, Veracruz, Mexico Río La Antigua, Veracruz, Mexico Río La Arena, Oaxaca, Mexico Río La Arena, Oaxaca, Mexico Río La Arena, Oaxaca, Mexico Río La Boquilla, Tamaulipas, Mexico Río La Parada, San Luis Potosí, Mexico Río La Purísima, Baja California Sur, Mexico Río La Toma, San Luis Potosí, Mexico Río La Trinidad, Veracruz, Mexico Río La Venta, Chiapas, Mexico Río La Venta, Chiapas, Mexico Río Lacanjá, Chiapas, Mexico Río Lagos, Jalisco, Mexico Río Lagos, Jalisco, Mexico Río Laja, Guanajuato, Mexico Río Lajas, Durango, Mexico Río Lalana, Oaxaca, Mexico Río Las Boquillas, Chihuahua, Mexico Río Las Golondrinas, Chihuahua, Mexico Río Las Pozas, Veracruz, Mexico Río Las Pozas, Veracruz, Mexico Río Las Tejas, Oaxaca, Mexico Río Las Tinajas, Durango, Mexico Rio Leão, Santa Catarina, Brazil Río Lerma, Guanajuato, Mexico Río Lerma, Jalisco, Mexico Río Lerma, México, Mexico Río Lerma, México, Mexico Río Lerma, México, Mexico Río Lerma, México, Mexico Río Lerma, Jalisco, Mexico Río Lerma, Guanajuato, Mexico Río Lerma, México, Mexico Río Lerma, México, Mexico Río Lerma, Jalisco, Mexico Río Lerma, Guanajuato, Mexico Río Lerma, México, Mexico Río Lerma, Guanajuato, Mexico Río Lerma, Guanajuato, Mexico Rio Limoeiro, Pará, Brazil Rio Lobos o Rio Valle Creek, Castilla y León, Spain Rio Longá, Piauí, Brazil Rio Longá, Piauí, Brazil Rio Lontra, Tocantins, Brazil Río Los Hules, Veracruz, Mexico Río Los Hules, Veracruz, Mexico Río Los Hules, Hidalgo, Mexico Río Los Pescados, Veracruz, Mexico Río Los Pescados, Veracruz, Mexico Rio Lourenço Velho, São Paulo, Brazil Rio Macacaá, Pará, Brazil Rio Macacoari, Amapá, Brazil Rio Machacali, Pará, Brazil Rio Machacali, Pará, Brazil Rio Machado, Rondônia, Brazil Rio Macucuau, Roraima, Brazil Rio Macujubim, Pará, Brazil Rio Macumiri, Amazonas, Brazil Rio Macuri, Brazil Rio Madeira, Amazonas, Brazil Rio Madeira, Pando, Brazil Rio Madeirinha, Amazonas, Brazil Rio Madeirinha, Amazonas, Brazil Rio Madeirinha Ou Autaz-Açu, Amazonas, Brazil Rio Magu, Maranhão, Brazil Rio Maguari, Pará, Brazil Rio Maiauatá, Pará, Brazil Rio Maici, Amazonas, Brazil Río Malatengo, Oaxaca, Mexico Rio Mamorana, Maranhão, Brazil Rio Mamoré, Rondônia, Brazil Rio Mamoritanas, Amazonas, Brazil Rio Mamuru, Amazonas, Brazil Rio Mamuru, Pará, Brazil Rio Manacapuru, Amazonas, Brazil Rio Manacapuru, Amazonas, Brazil Rio Manazaro, Brazil Rio Mandaquari, Pará, Brazil Rio Mandovi, Goa, India Rio Manhuaçu, Minas Gerais, Brazil Rio Manhuaçu, Minas Gerais, Brazil Rio Manhuaçu, Minas Gerais, Brazil Rio Manicoré, Amazonas, Brazil Rio Maniquara, Pernambuco, Brazil Rio Manissauá-Miçu, Mato Grosso, Brazil Rio Manoel Alves, Tocantins, Brazil Río Manso, Veracruz, Mexico Río Manso, Veracruz, Mexico Rio Manuel Alves, Tocantins, Brazil Rio Mapari, Maranhão, Brazil Rio Mapiá, Amazonas, Brazil Rio Mapuá, Pará, Brazil Rio Mapuá Grande, Pará, Brazil Rio Mapuera, Pará, Brazil Río Marabasco, Colima, Mexico Río Marabasco, Colima, Mexico Rio Maracaçumé, Maranhão, Brazil Rio Maracanã, Pará, Brazil Rio Maracá-Pucu, Amapá, Brazil Rio Marajó-Açu, Pará, Brazil Rio Marajó-Eté, Pará, Brazil Rio Marajoí, Pará, Brazil Rio Maranhão, Goiás, Brazil Rio Marapanim, Brazil Rio Marapanim, Pará, Brazil Rio Marapi, Pará, Brazil Rio Maratauira Costa Maratauíra, Pará, Brazil Rio Maratoã, Piauí, Brazil Rio Maraú, Amazonas, Brazil Rio Marauiá, Amazonas, Brazil Rio Marciano, Maranhão, Brazil Rio Margarida, Mato Grosso, Brazil Río María García, Jalisco, Mexico Rio Marié, Amazonas, Brazil Rio Mariepauá, Amazonas, Brazil Rio Marimari, Pará, Brazil Rio Marimari, Amazonas, Brazil Rio Marinaú, Pará, Brazil Rio Marituba, Pará, Brazil Rio Maruim, Maranhão, Brazil Río Mátape, Sonora, Mexico Río Mátape, Sonora, Mexico Río Mátape, Sonora, Mexico Rio Matapi, Amapá, Brazil Río Matatán, Sinaloa, Mexico Rio Mataurá, Amazonas, Brazil Rio Matipó, Minas Gerais, Brazil Rio Matuni, Pará, Brazil Rio Matupiri, Amazonas, Brazil Rio Maú Ou Ireng, Roraima, Brazil Rio Maués-Açu, Amazonas, Brazil Rio Maués-Mirim, Amazonas, Brazil Río Mayo, Sonora, Mexico Río Mayo, Sonora, Mexico Río Mayo, Sonora, Mexico Río Mayo, Sonora, Mexico Rio Mazagão, Amapá, Brazil Rio Meaípe, Espírito Santo, Brazil Rio Meaípe, Espírito Santo, Brazil Rio Membeca, Mato Grosso, Brazil Rio Mercedes, Tocantins, Brazil Rio Mercedes, Tocantins, Brazil Rio Merepe, Brazil Rio Meruú-Açu, Pará, Brazil Rio Mestre Falcão, Mato Grosso, Brazil Río Mezcalapa, Tabasco, Mexico Río Mezcalapa, Tabasco, Mexico Río Mezquital, Durango, Mexico Río Mezquital, Durango, Mexico Río Mezquital, Durango, Mexico Río Milpillas, San Luis Potosí, Mexico Rio Mineruazinho, Amazonas, Brazil Rio Mineruazinho, Amazonas, Brazil Rio Mineruazinho, Amazonas, Brazil Rio Mineruazinho, Amazonas, Brazil Rio Mineruazinho, Amazonas, Brazil Rio Mineruazinho, Amazonas, Brazil Rio Mineruazinho, Amazonas, Brazil Rio Mineruazinho, Amazonas, Brazil Rio Mirim, Brazil Rio Miriri, Paraíba, Brazil Rio Miritibinha, Brazil Río Misantla, Veracruz, Mexico Río Mixteco, Puebla, Mexico Río Mixteco, Oaxaca, Mexico Río Mixteco, Puebla, Mexico Río Mixteco, Puebla, Mexico Río Mixteco, Puebla, Mexico Rio Mocajatuba Grande, Pará, Brazil Rio Mocajuba, Pará, Brazil Rio Mocajuba, Pará, Brazil Rio Moções, Pará, Brazil Río Moctezuma, San Luis Potosí, Mexico Río Moctezuma, Sonora, Mexico Río Moctezuma, Hidalgo, Mexico Río Moctezuma, San Luis Potosí, Mexico Río Mohinora, Chihuahua, Mexico Rio Moju, Pará, Brazil Rio Moju, Pará, Brazil Rio Mojú, Pará, Brazil Rio Mojurucá Grande, Pará, Brazil Rio Molhado, Brazil Rio Moquém, Mato Grosso do Sul, Brazil Rio Morcego, Brazil Rio Morcego, Pará, Brazil Rio Morto, Tocantins, Brazil Rio Mosele, Piauí, Brazil Rio Mosele, Piauí, Brazil