Common Nighthawk (Chordeiles minor) Science Article 4
the time of Oberholser’s revision of the subspecies of Chordeiles minor in 1914 (Bull. U. S. Nat. Mus., 86), the southernmost known limits of the continental breeding range of this species were based on a specimen of henyri from Babfcora, central-western Chihuahua, collected on June 21, 1902, and examples of arerriensis from Matamoros, extreme northeastern Tamaulipas, taken August 15 and 23, 191).
ROBERT K. SELANDER, FROM FIELD AND STUDY