Adults inhabit the main channels of the Rio Grande and Pecos River usually over sand or gravel. With two subspecies: N. s. simus known from Rio Grande above El Paso, Texas, but now possibly extinct; N. s. pecosensis known only in the Pecos River, New Mexico, recognized as a threatened subspecies .
Physical description for Bluntnose shiner is currently being compiled.
Behavioural data for Bluntnose shiner is currently being reviewed.
Diet information for Bluntnose shiner is currently being compiled.
Reproduction data for Bluntnose shiner is currently being compiled.
Freshwater; benthopelagic; potamodromous . Temperate; 36°N - 32°N North America: upper Rio Grande (above El Paso, Texas), Texas and New Mexico and in the Pecos River, New Mexico, USA.
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