TWIL #018 - The Secretary Bird Kicks Snakes to Death
The secretary bird hunts venomous snakes on foot - not with its beak, but with explosive, skull-crushing kicks delivered in under 15 milliseconds.
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- #birds
- #nature
The secretary bird (Sagittarius serpentarius) is a large bird of prey that does something most raptors don't: it hunts entirely on foot, striding across the African savanna on legs that look borrowed from a crane.
Its speciality is snakes - including highly venomous ones like cobras and puff adders. The technique is calculated. It uses its wings to distract the snake and keep it off-balance, then delivers rapid stamping kicks with a force measured at up to 195 Newtons (roughly five times the bird's own body weight) in a contact time of just 15 milliseconds. That's fast enough to stun or kill the snake before it can coil and strike back.
Research using high-speed cameras at 1,500 frames per second confirmed the kick speed - the motion is completely invisible to the naked eye.
The name is thought to come from the long crest feathers at the back of its head, which resemble the quill pens that 19th-century secretaries tucked behind their ears. The bird appears on the coat of arms of both South Africa and Sudan.
It's also not exclusively a snake hunter - it eats insects, lizards, small mammals, and eggs. But the snake-killing behaviour is what made it famous, and it's one of the few animals on Earth that routinely takes on venomous prey by deliberately getting within striking distance and betting on its own reflexes.