The correct spelling of the word for the notorious biting fly found in Africa is actually "tsetse". The phonetic transcription for this word is /ˈtsɛtseɪ/. The word "bull fly" might be a common mistake due to a similar sound between "tsetse" and "bull", but the spelling of the word should be respected to avoid confusion and misunderstandings in communication. Tsetse flies are known for transmitting diseases such as sleeping sickness and are a significant threat to both humans and animals in affected areas.
"Bull fly" refers to a type of insect belonging to the Tabanidae family, commonly known as horseflies. These flies are recognized for their stout body structure, large compound eyes, and strong mouthparts used for piercing and sucking blood from their hosts. They are called "bull flies" due to their tendency to bite and pester livestock animals, including bulls, cows, horses, and other domesticated animals.
The characteristic features of bull flies include their robust size, typically ranging from 1 to 2 centimeters in length, and their dark coloring, which helps them blend into their surroundings. They possess transparent wings that are often iridescent and can be very agile fliers. Bull flies are often found in rural areas, close to open pastures, marshy regions, and water bodies, as these areas provide suitable habitats for them to thrive.
These flies feed on the blood of their hosts, and both male and female bull flies rely on this protein-rich diet. Their bites can cause significant discomfort and irritation to animals, leading to potential economic losses in livestock farming. For humans, a bull fly bite can be painful and may cause local allergic reactions.
Bull flies are also known as aggressive biters, targeting any exposed skin to access the blood vessels beneath. They are most active during the day, especially during warm weather conditions, and are attracted to hosts by visual cues, warmth, and odors emitted by animals.
Control measures for bull flies include the use of insecticides, fly repellents, and physical barriers, such as screens or protective clothing, to reduce their access to hosts.
A gadfly.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.