Here’s an interesting observation of an unusually prolonged battle between two large tropical hummingbirds, posted by Dennis Arendt, Lelis Navarete, Kit Larsen, Roger Robb, and Leon Esthleman to NEOORN-L, a listserv for ornithologists working in the Neotropics, and cross-posted to HUMNET (reformatted for ease of reading):
On 5 October, 2010, at the hummingbird feeding station at Cabañas San Isidro east of Quito, Ecuador, two male Fawn-breasted Brilliants fell to the ground together. They appeared to have their feet intertwined and their bills were jabbing each other. It was 15:31 and a light rain had begun.
They stayed quiet in the wet grass with one bird on top of the other. Both birds had their wings extended fully. The bird on top had its long bill stuck into the neck feathers of the bird underneath. The bird dominating the other would move its bill from the neck to the wing, probing and sometimes grabbing feathers.
After about ten minutes, the bird underneath would fight to release himself from the bird above. They flopped sideways and moved a few centimeters, but the dominating bird stayed on top. They would stay quietly in the grass for several minutes, then the struggle would be repeated with the same results.
The rain grew heavy and this struggle continued for one hour and forty minutes. At 17:11 the dominating bird flew up to a sugar water feeder and sat on top, not on the perch, and drank for half a minute. Then it flew away.
The other hummingbird was picked up from the wet grass. It was thoroughly wet, but alive, and showed no indications that its flesh had been pierced by the other bird’s bill. The defeated bird would surely have died without help. It was taken back to the kitchen at Cabañas San Isidro where it was warmed and fed sugar water. It too flew off after about fifteen minutes.
Emphasis added to highlight additional evidence of the inadequacy of a hummingbird’s bill as a weapon. Poking? Yes. Grabbing? That too. Piercing? Not so much.
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