Who Was Jean-Henri Fabre? The Self-Taught Teacher Who Wrote Insects' Life Stories

Jean-Henri Fabre (1823–1915) was a French naturalist and teacher who spent decades watching living insects in the wild and in his own garden, then wrote about them with such warmth and detail that his books read like biographies. He came from a poor family, was largely self-taught, and is regarded by many as one of the founders of modern entomology, the study of insects. Charles Darwin, who did not share all his views, called him "an inimitable observer".

A poor boy from the Aveyron

Fabre was born in 1823 in Saint-Léons, in the Aveyron region of southern France, into a poor family. There was little money for schooling, and much of his education came from his own reading and observation. Even as a child he was fascinated by the insects and plants around him.

At 19 he earned a certificate to teach in primary schools, and he went on to teach in Carpentras, in Ajaccio on Corsica, and in Avignon. Alongside teaching, he studied physics, chemistry and botany largely on his own.

A new way of studying insects

In Fabre's time, many naturalists studied insects mainly as dead specimens pinned in boxes, focusing on classification. Fabre wanted to know how insects actually lived: how a wasp hunts, how a beetle raises its young, how a spider builds its web. So he watched them alive, patiently, for hours, days and years, and he designed simple experiments to test their behaviour.

Insects as characters

What made Fabre famous beyond science was his writing. Instead of a dry, detached style, he wrote about insects in biographical form, combining what he called his passion for scientific truth with close, affectionate observation. His great work, the Souvenirs entomologiques, is a long series of texts about insects and arachnids published over many years. In it, dung beetles roll their balls, wasps paralyse their prey with precise stings, and the reader is drawn into small dramas happening at their feet.

The caterpillars that walked in circles

One of Fabre's most famous experiments involved pine processionary caterpillars, which travel in long lines, each following the silk thread left by the one in front. Fabre led a line of them onto the rim of a large flowerpot so that the head of the line joined its tail. The caterpillars kept circling, following the trail, for about seven days.

The experiment showed how powerfully instinct can guide behaviour, even when it leads nowhere. It is still quoted today, sometimes as a lesson about blindly following routines.

Fabre and Darwin

Fabre corresponded with the scientific world, and Darwin admired his observations, calling him an "inimitable observer". Yet Fabre was sceptical of the theory of evolution and preferred not to draw broad conclusions from his observations. His strength was the detailed record, not the grand theory, and his observations remained valuable regardless of the debate.

The Harmas: a laboratory in the garden

In his later years Fabre settled in Provence, at a property he called the Harmas, a word for an uncultivated, stony piece of land. There he let the garden grow wild so that insects would thrive, and he observed them every day. The house is now a museum, the Harmas de Fabre, and there is another museum dedicated to him, Micropolis, near his birthplace.

He died on 11 October 1915. English readers came to know his work mostly through translations published between 1912 and 1922. In Japan his insect books are especially beloved, and generations of children there have grown up reading them.

Why Fabre still matters

Fabre showed that you do not need expensive equipment to do real science; you need curiosity, patience and a notebook. He also showed that science can be written as a good story. For language learners, his approach is a useful model too: watch closely, describe precisely, and turn what you see into vivid sentences.

Learn with Fabre: English phrases about observation

Phrase	Meaning	Example
to keep an eye on	to watch carefully	Keep an eye on new words in every article.
to go round in circles	to make no progress	Without a plan, I was going round in circles.
to take note of	to notice and remember	Take note of how native speakers greet each other.
as busy as a bee	very busy	She's been as busy as a bee all week.
in the blink of an eye	very quickly	The spider caught the fly in the blink of an eye.

Try this: Be Fabre for five minutes. Watch a small creature or plant near you and write three precise English sentences about what it does, using "keep an eye on" and one new verb of movement.