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Collecting birds on bridge along the Lower Rio Grande.
Collecting birds on bridge along the Lower Rio Grande.
Collecting migratory birds in Mexico to document acquisition of contaminants by migrant birds.
Collecting Mexican free-tailed bats under bridges to assess insecticide exposure.
Miguel Mora on the Rio Grande near Big Bend National Park looking for peregrine falcon's nests.
Yellow-breasted chat from the Lower San Pedro River.
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