Tsetse fly

The tsetse is a large fly.

It lives in many parts of Africa. These flies eat blood from animals.

You can spot them easily. They fold their wings flat when resting. They also have a long mouth. This mouth points straight out from their head.

These flies are very tough. They are hard to crush.

Some flies have wings with a shape like a hatchet. This helps people know which fly is a tsetse.

The mother fly helps her babies grow. She feeds them a special milk. The babies stay safe inside her first. Then they grow in a hard shell in the ground.

These flies are very important to study. They can spread sickness to people and animals.

The tsetse fly is a large fly found in Africa.

These flies are parasites. This means they live by feeding on the blood of animals. They can carry germs that make people and animals sick.

You can spot a tsetse fly by looking at its body. When they rest, they fold their wings flat. One wing sits right on top of the other.

They also have a long proboscis. This is a thin mouth that points straight out from the head.

Some flies have a shape on their wing like a hatchet. This is called a hatchet cell.

Tsetse flies have a very special way of growing. A mother fly keeps her baby inside her body. She feeds the baby a milky substance. This helps the baby grow safely.

When the baby is ready, it leaves the mother. It crawls into the ground and makes a hard shell. This shell is called a puparium. The fly stays in this shell until it is a full adult.

The tsetse fly is a large biting insect found in tropical Africa.

These flies are known as obligate parasites. This means they must live by feeding on the blood of vertebrate animals. They are very important to study because they act as biological vectors. A vector is something that carries a disease from one place to another.

Tsetse flies carry tiny organisms called trypanosomes. These can cause sickness in both humans and animals. This has a big impact on public health and the economy in sub-Saharan Africa.

You can recognize a tsetse fly by looking at a few special features.

When they are resting, they fold their wings completely over their bodies. One wing rests directly on top of the other wing.

They also have a long mouthpart called a proboscis. This thin structure points straight forward from the bottom of the head.

If you look closely at their wings, you might see a hatchet cell. This is a shape in the middle of the wing that looks like a meat cleaver.

Their antennae also have special branched hairs on them.

The life of a tsetse fly follows a very unusual path.

Instead of laying many eggs, a female fertilizes only one egg at a time. She keeps the egg inside her uterus to protect it. The baby grows inside the mother as a larva. The mother even feeds the baby a special milky substance. When the larva is ready, it leaves the mother and crawls into the ground. It then builds a hard case called a puparium. The fly stays inside this shell for about 35 days before emerging as an adult.

Scientists have learned a lot about these insects over many years.

In 2014, researchers even sequenced the genome of the species Glossina morsitans. There are 23 different species of tsetse flies living in Africa and the Arabian Peninsula today. These species are often grouped into three types: savannah flies, forest flies, and riverine flies. Fossilized tsetse flies have even been found in rocks from the Paleogene period. These fossils were discovered in places like Germany and the United States.

Tsetse flies are quite tough compared to other insects.

A housefly is easy to hit with a swatter, but a tsetse fly is much harder to crush. They have a very large crop, which is a part of their gut. This allows them to take a blood meal that is equal to their own weight.

This large meal provides the energy needed for the mother to feed her growing offspring. Just like many animals, tsetse flies rely on finding the right food to survive and grow.

The tsetse fly belongs to the genus Glossina. These insects are large biting flies found in tropical Africa and the Arabian Peninsula.

They are classified as obligate parasites. This means they must feed on the blood of vertebrate animals to survive. Tsetse flies are scientifically important because they act as biological vectors. A vector is an organism that carries and transmits a disease.

Specifically, they transmit trypanosomes. These tiny organisms cause human and animal trypanosomiasis. This disease has major impacts on public health and the economy in sub-Saharan Africa.

Adult tsetse flies have a very specific body plan, or bauplan.

You can identify them by four main physical features. First, they have a long, thin proboscis. This mouthpart is attached to the bottom of the head by a distinct bulb and points directly forward.

Second, they have unique wings. When resting, they fold their wings completely over their abdomens. One wing rests directly on top of the other.

Third, the wing has a discal medial cell with a hatchet shape. This looks like a meat cleaver or a hatchet.

Finally, their antennae feature an arista with branched hairs.

The anatomy of the tsetse fly is built for heavy feeding. Like all insects, the body has a head, a thorax, and an abdomen. The large thorax holds three pairs of legs and two wings. The abdomen is wide and short. It can change size dramatically during a meal.

The tsetse has a large crop, which is a part of its digestive system. This allows the fly to consume a blood meal equal to its own body weight. These flies are physically tough. They are much harder to crush than common houseflies.

Tsetse flies have an unusual life cycle called adenotrophic viviparity.

Most insects lay many eggs, but a female tsetse fertilizes only one egg at a time. She keeps the egg inside her uterus. The offspring develops internally through three larval stages. During this time, the mother feeds the larva a milky substance from a modified gland. This process relies on the high quality of the mother's blood meals. After the third larval stage, the larva leaves the mother. It crawls into the ground and forms a hard puparium. Inside this shell, the insect undergoes metamorphosis. It emerges as a full adult after about 35 days.

There are 23 known extant species of tsetse flies. Scientists often group them into three categories based on where they live and how they behave. These include savannah flies, forest flies, and riverine or lacustrine flies. The morsitans group contains savannah flies. The fusca group contains forest flies. The palpalis group includes riverine flies. Each group has different hosts. For example, some species feed heavily on warthogs or bushbuck. Others may feed on birds or even crocodiles.

History shows that tsetse flies have existed for a very long time. Fossilized specimens have been recovered from Paleogene rocks. These fossils were found in both Germany and the United States.

In more recent history, the term "tsetse" became common in English during World War II. This happened because of a British de Havilland aircraft called the Tsetse Mosquito. In 2014, scientists achieved a major milestone by sequencing the genome of Glossina morsitans. This helps researchers understand their genetics and how they interact with their environment.

Tsetse flies are also studied for their relationship with other organisms. They have at least three bacterial symbionts. The primary symbiont is called Wigglesworthia. It lives within special cells called bacteriocytes. They also host Sodalis and Wolbachia. These bacteria are part of the fly's complex biological system. Understanding these connections helps scientists manage the diseases the flies carry.