Secretary Bird
The secretary bird is one of Africa's most distinctive birds of prey, and the only living member of its own family, Sagittariidae. Unlike other raptors it hunts on foot, walking up to 30 kilometers a day through open grassland and savanna on legs that carry it to about 1.3 meters tall. It is famous for killing snakes, venomous ones included, by stamping on them: a 2016 study measured strikes of around 195 newtons, roughly five times the bird's own body weight, delivered in about 15 milliseconds, a tenth of the time it takes to blink. Snakes are only part of the menu, which also includes rodents, lizards, frogs, tortoises and large insects. The loose black crest, the bare orange red face and the slate gray plumage make it unmistakable, and its profile is stamped on the coats of arms of South Africa and Sudan. Pairs bond for life and reuse the same flat stick nest season after season. Grassland lost to farming has driven steep declines, and the IUCN moved the species from Vulnerable to Endangered in 2020.
Appearance
Few birds anywhere in the world are as instantly recognizable as the secretary bird. It stands up to 1.3 meters tall on bare, scaly legs that account for much of its height, giving it a silhouette unlike any other raptor. The body is covered in pale gray feathers, while the flight feathers and the long central tail plumes are black. A cluster of loose black crest feathers trails from the back of the head, thought to resemble the quill pens that clerks once tucked behind their ears. The face is bare and covered in bright orange-red skin, contrasting sharply with the gray plumage. When it spreads its wings across nearly 2.1 meters, the combination of size and bold coloring makes it an unforgettable sight across the open grasslands it calls home.
Secretary bird, sagittarius bird or secretary eagle?
The bird collects names because nothing else looks like it. The most widely accepted story behind secretary bird is that the loose black crest feathers reminded early European observers of the quill pens that office clerks, the secretaries of the day, tucked behind their ears; a competing theory traces the name to an Arabic phrase for hunter bird that passed through French. Sagittarius bird comes straight from the scientific name, Sagittarius serpentarius, the archer of serpents, given for the way the crest and the striding gait suggested an archer with arrows on his back. Secretary eagle is the one name that is simply wrong: this is not an eagle and not especially close to one. It is the only living species in the family Sagittariidae, a branch of the raptors that went its own way tens of millions of years ago and traded flight hunting for long legs and a life on the ground.
Hunting strategy
What makes the secretary bird remarkable is the way it hunts. Rather than diving from the air like most birds of prey, it walks through the grass, covering up to 30 kilometers a day, and flushes prey from the ground. When it locates a target, a snake, rodent, lizard, frog, tortoise or large insect, it delivers rapid, powerful stamps with its feet. A 2016 study in Current Biology measured those strikes at around 195 newtons, roughly five times the bird's body weight, with the foot in contact with the target for about 15 milliseconds, a tenth of the duration of a human blink. That speed is the whole point: a cobra or puff adder simply cannot react inside that window. The bird also uses its open wings to shield itself and unbalance the snake, and the thick scales down its legs give some protection if a strike does land.
Habitat and distribution
Across sub-Saharan Africa, from Senegal and The Gambia in the west to Somalia and Ethiopia in the east and south through the continent to South Africa, the secretary bird occupies open country where visibility is good and walking is easy. The IUCN records it as resident in some 35 countries, which makes it one of the most widely spread raptors in Africa on paper, though the birds are thin on the ground almost everywhere. It favors grasslands and savannas with short to medium vegetation and also uses open shrubland and lightly wooded country. Dense forest is avoided entirely, because the bird depends on spotting and chasing prey on foot over long distances. It is not migratory but moves locally with rainfall and food. Nesting pairs hold a familiar territory and often return to the same tree year after year as long as the surrounding grassland holds up.
Behavior
Secretary birds form pairs that last for life, and the bond between two partners is maintained through aerial displays in which both birds soar together over their territory. Most activity happens on the ground, where a pair may walk side by side for much of the day while foraging. Nests are broad, flat platforms built from sticks and lined with grass, placed on top of flat-topped acacia and other trees, sometimes reaching a diameter of over two meters after years of reuse. Females lay one to three eggs per clutch, and both parents share incubation duties over roughly 45 days. Chicks are fed regurgitated food and take about three months to fledge. Outside the breeding season, individuals are sometimes seen alone, though pairs generally remain together.
Conservation
The IUCN moved the secretary bird from Vulnerable to Endangered in 2020, and the global population is put at somewhere between 6,700 and 67,000 individuals, a range wide enough to show how hard the species is to count across an entire continent. Surveys point to steep declines over recent decades, driven mainly by the conversion of grassland and savanna to farmland. Overgrazing degrades the open habitat the bird depends on, collisions with fences and power lines kill adults, and trapping for trade and traditional use continues in parts of the range. Because the species needs large stretches of intact open country, fragmentation hurts it more than most. Like all raptors in international trade it is listed on Appendix II of CITES. Conservation work focuses on protecting key grasslands, tracking numbers through citizen science such as the Southern African Bird Atlas Project, and convincing farming communities that a resident pair is free pest control.
Where it is found
The Secretary Bird can be found in places such as:
