Smart Bees Work Harder.

How Bees Zero In on the Best Flowers—and Find Their Way Back

A bee may look like it is simply buzzing from flower to flower, but there is a remarkable amount of information packed into that tiny brain. When a honeybee discovers a particularly rewarding patch of flowers, it can learn where that food source is and return to it with surprising accuracy.

The secret begins with smell, sight, and memory.

Bees can detect floral scents from considerable distances, and different flowers produce different combinations of chemicals. A bee can learn that a particular scent means a rewarding source of nectar or pollen. Once it finds a flower that provides plenty of food, the bee has a strong reason to remember it.

Vision plays an important role too. Bees see colours differently from humans. They can detect ultraviolet light, which allows them to see patterns on some flowers that are invisible to us. These patterns can act like landing guides, directing the bee toward the flower's nectar and pollen.

But finding the flowers is only half the story.

A honeybee can also learn the location of a productive food source. As it flies through the landscape, it uses visual landmarks such as trees, buildings, fences, and other distinctive features to help navigate. Researchers have found that bees can form memories of their surroundings and use those memories to return to familiar locations.

There is another astonishing piece of the puzzle: the famous waggle dance.

When a worker honeybee returns to the hive after discovering a valuable food source, it can perform a particular movement known as the waggle dance. The direction and duration of the dance communicate information about where the food is located relative to the Sun. Other worker bees can use this information to head toward the general area of the flowers.

The Sun acts like a natural compass.

Even when clouds obscure it, bees can detect the pattern of polarized light in the sky, giving them another way to maintain their sense of direction. As the Sun moves across the sky during the day, bees also compensate for its changing position.

Once a bee reaches the general area, its memory and senses take over again. It can recognize familiar landmarks, search for the flowers it remembers, and use their colours and scents to locate the richest blooms.

And bees don't necessarily waste energy visiting every flower they encounter. If a particular type of flower is providing abundant nectar or pollen, a bee may concentrate its efforts there. This behaviour, called flower constancy, makes the bee an extremely efficient pollinator.

So when you watch a bee apparently "zero in" on one particular flower patch, you're seeing the result of an impressive navigation system. The bee is combining smell, colour, ultraviolet patterns, landmarks, memory, the position of the Sun, and information shared by other bees.

All of that happens inside an insect whose brain is smaller than a grain of rice.

The next time a bee disappears over a garden and then returns several minutes later to exactly the same patch of flowers, remember: it probably isn't wandering around randomly.

It knows where the good stuff is.