All herons and egrets are very highly evolved and extremely
skilled predators. Little Blues may feel around with their feet
here and there, but they are sight feeders- first and foremost.
The person who called the behavior you described 'triangulation'
hit the nail on the head here. These birds have very acute vision,
and that weaving from side to side enables them to precisely
locate prey and measure distance to the food item as well. When
you may only have one stab at a fast moving meal- you analyze all
of the variables before you make your move. The bird uses the
information gleaned during its assessment to calculate the precise
movements required for a one-shot kill. Failure is not an option.
Smart bird. Smart, efficient bird.
Bayonet Point, FL
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I have twice tried to get this video to be accessible, but probably due to my lack of technical skill, only a few people have been able to watch it. �Let's try a description:
An adult little blue heron was stalking prey in the Viera Wetlands marsh. �As it did so, it started to wave its entire neck and head from side to side, describing about a 120 degree arc. �It did this curious motion about 6 times over a course of about 20-30 seconds and then stopped. �It really looked like a metronome!
Does anyone have any knowledge of what this bird was doing? �One person thought it might be triangulating prey. �Any insights would be most appreciated.
Sam Fried, Titusville, Brevard