There is little information on the behavior of Beautiful Hummingbird. This species forages and perches at all heights, from low to high, but spends most of its time fairly low near the ground (Howell and Webb 1995). Beautiful Hummingbird also sallies from a perch to capture small flying insects (Scott 1999).
There is no information on territoriality in Beautiful Hummingbird. The closely related Lucifer Hummingbird (Calothorax pulcher) is territorial at patches of flowering plants (Scott 1994).
Little information. Beautiful Hummingbird presumably is polygynous, as are most if not all species of hummingbirds (Schuchmann 1999: 509).
Howell and Webb (1995) briefly describe a courtship display by the male: "rocks back and forth, bill tip to bill tip with perched [female], his tail fanned and twisted almost to 90º from his body plane, then he climbs steeply to 10+ m and dives down to swoop over [female]". During this display, the male utters "a very high, thin to slightly squeaky t-swiik t-swiik ... or w-siiu w-siiu ..." (Howell and Webb 1995).
Social and interspecific behavior
Beautiful Hummingbird usually is solitary, as is typical of hummingbirds.
No documented reports of predation on Beautiful Hummingbird?