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Why Are Bees Important — and What Makes Bees Different?

Bees! From honey bees to bumble bees, solitary or colony-forming, these insects have shaped modern agriculture. So why, exactly, are bees important?

| April 2015

  • Bee orientation
    Unloading honey bee hives for use in almond orchards begins under a winter sun. Finally freed, millions of bees fly around in all directions for a cleansing and orientation flight.
    Photo courtesy Science Photo Library/Eric Tourneret/Visuals Unlimited
  • Bee head
    The head of a honey bee, showing the large compound eyes, antennae and proboscis.
    Photo courtesy USGS Bee Inventory and Monitoring Lab/Sam Droege
  • Flowers
    Marsh marigold (Caltha palustris) as viewed in normal daylight (top) and how a bee sees it in ultraviolet light (bottom).
    Photo courtesy Science Photo Library/Cordelia Molloy
  • The Bee
    Noah Wilson-Rich explores the astounding diversity of bees in "The Bee," from evolution and genetics to why bees are important for modern agriculture and an overview of beekeeping.
    Cover courtesy Princeton University Press

  • Bee orientation
  • Bee head
  • Flowers
  • The Bee

In The Bee (Princeton University Press and Ivy Press, Limited, 2014), Noah Wilson-Rich, Kelly Allin, Norman Carreck and Andrea Quigley provide a window into the vitally important role that bees play in the life of our planet. This richly illustrated natural history of the bee takes an incomparable look at the astounding diversity of bees, blending an engaging narrative with practical, hands-on discussions of such topics as beekeeping and bee health. The following excerpt is from chapter 2, “Anatomy and Biology.”

Bees are unique in many ways. In their anatomy they are similar to their carnivorous wasp ancestors, but in their biology they have evolved into something entirely different. Most bees do not have hardened mandibles (mouthparts) for chewing flesh; they sip nectar from flowers using a specialized proboscis. Bees are not parasitic within other animals like some wasp larvae, but some are social parasites, rather like cuckoos. Bees focus their diet on pollen and nectar, and play a vital role in the pollination of many species of flowering plants. Furthermore, from a human perspective, what really makes bees unique is their significant agricultural, economic, and scientific importance.


Bees are amazingly effective pollinators, in part because of their sheer numbers. Honey bee colonies have tens of thousands of individuals—perhaps up to eighty thousand—per colony. It only takes one bee to visit, for example, one almond flower, and then a second almond flower, to make an almond. And there are well over a million honey bee hives in the handful of Californian counties that produce almonds for the entire United States and regions beyond. Further multiply these numbers by the more than 130 crops that bees pollinate worldwide, and then factor in all the countries around the world growing fruits and vegetables, and you will begin to get a sense of the vital importance of bees to agriculture. These figures also demonstrate how massively effective bees are in driving our current agricultural practices. However, it is not just honey bees that are vital to our agriculture; many other types of bee are terrific pollinators too, including bumble bees, mason bees, and squash bees among others.


In the USA, honey bees are estimated to contribute over $15 billion annually to the economy. However, the honey bee population has been declining drastically since the 1980s, due to the onset of new diseases and pests, pesticides, and habitat loss, and this decline has coincided with an increase in agricultural demand. The result has been a rise in the price of food, especially in the case of almonds, which up to now have relied entirely on honey bees for pollination. The blue orchard bee (Osmia lignaria) has recently been introduced as a pollinator in commercial almond orchards, and other bee species are being studied as possible pollinators for this crop. Bumble bees, too, are used for crop pollination and make a vital contribution to the global economy. In China, a shortage of bees means that human laborers now pollinate some crops by hand. And even in the United States some farmers are turning to human hands equipped with pollination wands and swabs—a technique already used on at least one urban farm in Boston—as a means to guarantee crop yields.


The research value of bees is enormous, and not only for their contributions in the field of agriculture. Bees can be trained, and the blue orchard bee is a focus of research to train the bees to a target— fruit blossom scent—for increased pollination efficiency. Given that the life span of a worker bee is typically a few weeks to a few months, bees are also used in research relating to age-related disorders such as Alzheimer’s disease, studying relationships between aging, memory, and behavior. Bees also act as research subjects in the study of epidemiology, conservation, communication, sociology, genetics, chemical ecology, and more.

Bee Senses

While bees share our world, they experience it quite differently. Cues from their surroundings—flowers, the sun, bodies of water—are all received by sensory mechanisms within specialized organs that are very different from ours. So, for example, a flower that appears white to humans may appear blue to a bee.



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