A secretary bird can strike prey with a rapid downward kick. This tall African raptor spends much of its hunting time walking, turning long legs into weapons as well as transport.
Its hunting style is very different from the familiar image of a hawk diving from the sky.
A raptor on long legs
The secretary bird is Sagittarius serpentarius. It combines a bird-of-prey head and hooked bill with unusually elongated legs.
It searches open country for food, including insects, small vertebrates, and sometimes snakes. Snake hunting is memorable, but snakes are not its only meals.
A scientific overview in Current Biology describes its distinctive anatomy and habits.
Measuring a strike
Researchers studied the bird's kicking mechanics using force measurements and rapid recording.
The 2016 study documented fast, forceful contact. The work provides evidence for the hunting ability rather than relying only on dramatic video.
Measurements from a studied bird and setup should not become an exact universal number for every kick made by every secretary bird.
Feet, balance, and timing
A successful strike requires more than strong muscles. The bird must place its foot accurately while balancing its tall body and responding to moving prey.
Its wings can help during these interactions, while its legs allow it to search a wide patch of ground.
The black head feathers and striking face may attract the first glance, but the lower half of the body explains much of its feeding life.
Open country is a living habitat
Grasslands and savannas provide hunting space and prey. Habitat degradation can affect the resources on which this specialized raptor depends.
The secretary bird is remarkable because it challenges an expectation: a bird of prey does not have to hunt mainly on the wing. Sometimes the decisive movement is a carefully aimed step.
Photo credits
Featured image: Diego Delso; Source; CC BY-SA 4.0. Resized for web display.
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Body image 1: Hobbyfotowiki; Source; CC0. Resized for web display.
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Body image 2: Thomas Fuhrmann; Source; CC BY-SA 4.0. Resized for web display.
