Bateleur

The bateleur (*Terathopius ecaudatus*) is a medium-sized eagle belonging to the Accipitridae family.

It is a unique bird of prey found throughout Sub-Saharan Africa and parts of Arabia. Scientists classify it within the subfamily Circaetinae, which includes the snake or serpent eagles. This bird is the only member of its specific genus, *Terathopius*. It is so culturally significant that it may be the inspiration for the "Zimbabwe Bird," the national emblem of Zimbabwe.

The physical appearance of a bateleur changes significantly as it grows.

Adult males are primarily black with chestnut coloring on the mantle, rump, and tail. They feature grey patches on the leading edges of their wings and white greater coverts. In contrast, adult females have grey-brown greater coverts and black-tipped grey secondaries. A small percentage of adults, about 7%, exhibit a "cream morph" where chestnut areas are replaced by pale brown.

Juveniles look very different, appearing largely drab brown with paler feather scaling. They also possess much longer tails than the adults.

An adult bateleur has a very distinct body shape.

They possess extremely large heads for their size and relatively small bills. The bill is covered by a large cere, which is the fleshy area at the base of the beak. Their feet are large, and their legs are relatively short. Most notably, they have uniquely short tails. In adults, the tail is so small that the feet often extend below the tail tip. Their wings are long and bow-like, with a wingspan that is 2.9 times greater than their total body length.

The maturation process for a bateleur is exceptionally slow.

It can take between 7 and 8 years to reach full maturity, which is perhaps the longest stretch for any raptor. A juvenile bird remains similar to its immature state until about age 2 or 3. By the fourth year, it becomes a sooty-brown color. During the fifth year, the cere and feet may turn yellow and then a dull pink. By the sixth or seventh year, the plumage darkens and chestnut colors increase. Full maturity is usually reached by the eighth year when the shoulders become fully grey.

Bateleurs are highly aerial birds that spend much of their time soaring.

They are generalist feeders, meaning they eat a wide variety of foods. Their diet includes carrion, which is the meat of dead animals. They also hunt live prey, including small birds, reptiles, and various mammals. Some prey can be unexpectedly large for a medium-sized eagle.

While they can be aggressive, they are known to be easily flushed from their nests. They build sturdy stick nests in large trees but lay only a single egg at a time.

Genetic studies have helped scientists understand the complex history of this species.

While they look like snake eagles, genetic research shows they are part of the Circaetinae subfamily. Specifically, nucleotide sequences in the cytochrome b gene show a close relationship between the bateleur and the short-toed snake eagle. Other studies involving mitochondrial and nuclear DNA suggest an unexpected link to the Philippine eagle. Additionally, chromosome banding studies have identified a relatively recent genetic relationship with Old World vultures.

Today, the bateleur faces significant survival challenges.

The IUCN classifies the species as Endangered. This decline is driven by anthropogenic causes, which are activities caused by humans. These include habitat destruction, the use of pesticides, and direct persecution. Because of these threats, the population is mostly confined to protected areas. Protecting the open savannas and dry woodlands they call home is vital for their continued existence.