Parent: Chordeiles (Nighthawks)

└─ Chordeiles pusillus (Least nighthawk)

└─── Chordeiles pusillus esmeraldae

└─── Chordeiles pusillus novaesi

└─── Chordeiles pusillus pusillus

└─── Chordeiles pusillus saturatus

└─── Chordeiles pusillus septentrionalis

└─── Chordeiles pusillus xerophilus