The Robber Flies from the genus Promachus are quite loud, but that does not stop them from being very effective hunters.
Robber Flies eat all sorts of other flies as well as bees, wasps, beetles, and butterflies. If it flies and a Robber Fly can catch it, it becomes dinner. When a Robber Fly spies a resting insect, it can catch it and it becomes dinner. It is hard to outrun this zooming insect. For that reason, Robber Flies are efficient predators, and they have a big appetite for bugs.
During the day, it is possible to see a Robber Fly sitting on a fence, handrail, or garden box. It often hangs from branches or objects near the ground, waiting to ambush passing prey. After aerial chase, the large, buzzing Robber Fly overtakes its victim. Using its legs to grab it, the insect is carried to a nearby branch or leaf. The Robber Fly uses its hard mouth to pierce the body of its victim and then suck out the victim's insides.
Robber Flies are fast and loud. It is typical to hear one before actually seeing it. This particular species is yellow or tan with black spots along its abdomen. Its thorax is a brown hump. Large black eyes are separated by yellow hairs. Legs are red and black with spikes on them. likes to perch on vertical twigs and branches. Its larvae also eat insects, but they stick to prey on the ground.
Scientific Name: Promachus hinei
Other Name(s): Indiana Robberfly
Fly or Mosquito
Size (Adult; Length): 18mm to 40mm (0.70in to 1.56in)
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