Beetles, belonging to the order Coleoptera, are incredibly diverse insects that comprise a quarter of all known living organisms! There are an estimated 400,000 identified species of beetles, with so many species yet to be discovered1. Among them, there are size variations that would make your jaw drop.
On one end of the scale, we have the almost invisible feather-winged beetles, no larger than 0.01 inches. The Fringed Ant Beetle (Nymphister Kronaueri) is the smallest known beetle and measures around 0.25 millimeters in length. On the other end, the Goliath Beetle, which can grow to 6.7 inches and weigh 1.8 ounces, is one of the longest and heaviest insects in the world.
Furthermore, beetles live in almost every habitat except the extreme polar regions. They live in the driest deserts and the wettest tropical rainforests!
One interesting fact about beetles is that they use a form of pollination known as "mess and soil" pollination. Unlike bees and butterflies, these insects can eat all parts of a plant, from pollen and other floral tissues to even the bark of trees. They even poop within the flowers.
They are the primary pollinators of primitive flowering plants like cycads, magnolias, and water lilies. These plants often have large, bowl-shaped, or cup-shaped flowers that are more open and accessible to beetles than those targeted by bees or butterflies.
Blister Beetles produce an acrimonious substance known as cantharidin, which holds medical applications as a topical skin irritant for wart removal.
Additionally, it has historically been a prominent ingredient in purported love potions. Moreover, cantharidin has been used as an aphrodisiac and colloquially referred to as a Spanish fly.
Did you know that the Cicindela hudsoni, also known as the Australian Tiger Beetle, has been recorded as the fastest insect in the world? Despite its small size, it can run at an average speed of 5.5 mph (9 km/h), equivalent to a relative rate of 171 body lengths per second.
Interestingly, Tiger Beetles use a distinct chasing pattern known as "stop-and-go." They pause in the middle of their pursuit. The reason for this behavior is their poor eyesight. They cannot gather enough photons to form a clear image of their prey if they move too quickly. Therefore, they must stop, look around, and continue their chase.
