Daniel J. Field:
Blue-grey Gnatcatcher (Polioptila caerulea), Chiricahua National Monument, Arizona
Daniel J. Field:
Masked Gnatcatcher (Polioptila dumicola), Esteros del Iberá, Corrientes, Argentina
Daniel J. Field:
Blue-gray Gnatcatcher (Polioptila caerulea), Dinosaur Ridge, Colorado
Daniel J. Field:
Blue-gray Gnatcatcher (Polioptila caerulea), Dinosaur Ridge, Colorado
Daniel J. Field:
Long-billed Gnatwren (Rhamphocaenus melanurus), Felipe Carillo Puerto, Quintana Roo, Mexico
Daniel J. Field:
Yucatan Gnatcatcher (Polioptila albiventris), Misnébalam, Yucatán, Mexico