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Dung beetle

life science Maturity 7-9 Next article →

Dung beetles are specialized insects that feed on feces. They are not a single taxonomic group, meaning they do not all share one common ancestor. Instead, the behavior of eating dung has evolved in several different beetle families. Most dung beetles belong to the superfamily Scarabaeoidea. Within this group, the subfamily Scarabaeinae is known as the "true dung beetles." This single subfamily contains more than 5,000 different species.

These beetles live in many diverse habitats. You can find them in deserts, grasslands, savannas, and forests. They live on every continent except for Antarctica. Most dung beetles eat the waste produced by herbivores and omnivores. However, some species have very different diets. For example, certain Neotropical species are carnivores that prey on millipedes. Other species in Brazil eat winged leafcutter ants, while one species in the Iberian Peninsula eats acorns.

Caution Dung Beetles, South Africa
Caution Dung Beetles, South Africa

Scientists classify dung beetles into three functional types based on how they eat and nest. The first type is the "rollers." These beetles shape dung into a ball and roll it away. They might do this to store food or to create a brooding ball for their young. During this process, a male often rolls the ball while a female follows or hitches a ride. The second type is the "tunnelers." Species like Euoniticellus intermedius bury the dung exactly where they find it. The third type is the "dwellers." These beetles do not roll or burrow, but instead live directly inside the dung.

Karnak temple scarab beetle A
Karnak temple scarab beetle A

Our understanding of these insects improved through careful study. In the late 19th century, Jean Henri Fabre conducted important experiments. Before his work, people believed beetles helped each other move obstacles. Fabre proved this was a myth. He discovered that other beetles were actually waiting to steal the food. This showed that beetle behavior is often driven by competition.

Egypt.KV6.04
Egypt.KV6.04

Dung beetles possess incredible physical abilities. A male Onthophagus taurus can pull 1,141 times its own body weight. This strength is comparable to a human pulling six double-decker buses. Some species can also bury dung that is 250 times their own mass in a single night. Their navigation skills are also unique. The African beetle Scarabaeus satyrus is the only insect known to orient itself using the Milky Way. Another species, Scarabaeus zambesianus, uses the polarization patterns of moonlight to navigate.

Egypt.KV6.04
Egypt.KV6.04

These insects are vital to agriculture and the environment. By burying dung, they improve soil structure and help recycle nutrients. In the United States, they save the cattle industry an estimated $380 million every year. In Australia, the introduction of certain species helped reduce pestilent bush flies by about 90 percent. They also help plants grow. Research shows that when beetles mix dung into the soil, it significantly increases the nutritional value for plants.

Caution Dung Beetles, South Africa
Caution Dung Beetles, South Africa

Humans have shared a long history with these beetles. In Ancient Egypt, the beetle was a sacred symbol. The species Scarabaeus sacer was linked to the god Khepri, who represented the rising sun. The Egyptian script even used the beetle to represent the concept of "becoming" or "transformation." In other parts of the world, such as Southeast Asia, some species are used as food or in traditional medicines. They remain a deeply connected part of human culture and ecology.

Karnak temple scarab beetle A
Karnak temple scarab beetle A
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File:Caution Dung Beetles, South Africa.jpg
Caution Dung Beetles, South Africa.jpg
File:Karnak temple scarab beetle A.jpg
Karnak temple scarab beetle A.jpg
File:Egypt.KV6.04.jpg
Egypt.KV6.04.jpg
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