Blackfly (noun)

A small, black biting fly that feeds on the blood of mammals, especially humans and other primates, causing discomfort and spreading disease.

Origin:

Late 19th century: so named because of the typical black color of the flies.

Examples:

1. Blackflies are a common annoyance in many parts of the world, especially near rivers and other bodies of water.
2. The bites of blackflies can cause itching and swelling, and in some cases can spread disease.
3. In some regions, blackflies are a major threat to livestock, as they can reduce productivity and cause loss of blood, leading to anemia.
4. Efforts to control blackflies often involve the use of insecticides, as well as physical barriers such as screens and repellents.
5. In some parts of the world, blackflies are also used as a source of food for fish, birds, and other animals.