Fork-tailed Flycatcher (Tyrannus savana monachus) Two subspecies are recognized with the nominate being the bird found in Panama. The nominate race is highly migratory and has even been found in the U.S., though it is rare. No individuals of this subspecies has yet been taken from Panama but it is likely that migrants do reach Panama from the south. The nominate subspecies has much darker gray backs than subspecies monachus. Photographed at the jct. of the Panama Canal and the south side of the Chagras River, Panama Province, Panama. Riverine, humid forest at ca. 29 m (95 ft) elevation. Canon EOS 7D, Canon EF 300mm f/4L IS USM lens plus a 1.4 x teleconverter, ISO 250, Shutter speed 1/250 with flash, f/10