MESITES AND ROATELOS – Mesitornithidae



The three species of mesites and roatelos are approximately 12 inches (30 centimeters) in length. Mesites and roatelos are characterized by short, rounded wings, long, wide tails, and sturdy legs. Their bills curve downward, making it easier for them to forage, or hunt for food, on the forest floor.


Mesites and roatelos are found exclusively on the large island of Madagascar, off the eastern coast of Africa. The brown mesite (also known as the brown roatelo) occupies forested areas in the eastern part of the island. The white-breasted mesite (or white-breasted roatelo) is found in forests in the western and northern parts of the island. The subdesert mesite occupies a small area between the coast and hills in the southwestern potion of the island.


Mesites and roatelos are found in distinct habitats on Madagascar. The brown mesite inhabits humid rainforests. The white-breasted mesite inhabits deciduous (leafy) forests. The subdesert mesite occupies open, spiny thicket habitats.


The brown mesite and white-breasted mesite eat insects and other invertebrates, seeds, and small fruits from the leaf litter on the forest floor. The brown mesite and white-breasted mesite have bills that are adapted to lifting leaves without disturbing prey that may be hiding underneath. The subdesert mesite has a longer, more extensively curved bill that allows it to find invertebrates on the ground. Like the other mesite species, however, the subdesert mesite will sometimes feed in the leaf litter.


Mesites are diurnal, that is, they are active during the day. Mesites spend most of their time on the ground. Although they are able to fly, they generally do so only when threatened. Mesites are social species, that is, individuals congregate with other members of the same species. In the brown mesite and the whitebreasted mesite, birds can often be found in groups of three. This is frequently a male and female pair with their most recent young. The subdesert mesite is generally found in larger groups, of anywhere from six to ten individuals. Both white-breasted mesites and subdesert mesites are territorial, that is, they will defend their territory from other individuals of the same species.

Mesite songs can be fairly complex. In both brown mesites and white-breasted mesites, the male and female of a pair will sometimes sing together.

The brown mesite and white-breasted mesite are monogamous (muh-NAH-guh-mus), with each male bird mating with only a single female. The subdesert mesite is polygamous (puh-LIH-guhmus), with each male mating with multiple females. Mesites build nests of sticks in low bushes. Usually the female lays one to three eggs at a time sometime during the rainy season from October to April. It is not known how long the eggs take to hatch. Mesite chicks are precocial (pree-KOH-shul), meaning that they are fairly well developed when they hatch. For example, they have feathers and are able to move around. Mesite chicks tend to stay with their parents for quite some time. In the case of the white-breasted mesite, chicks may remain with the parents for up to a year.


All three species of mesites are well known to local humans and are hunted for food. However, in certain portions of Madagascar, the brown mesite is not hunted because it is protected by a taboo, one so strictly observed that it is forbidden to mention the bird’s name.


The three species of mesites are considered Vulnerable, facing a high risk of extinction, by the World Conservation Union (IUCN). This is due primarily to habitat loss, especially the destruction of forest habitats for agricultural use, logging, or the production of charcoal. Species associated with humans, such as dogs and rats, also negatively affect some populations.