Updated: 16th February 2021
What do bees eat and drink? Do bees only eat nectar from flowers? Do bees eat honey? Do all bees eat pollen, or are they doing something else with it? What about the diets of queen bees?
These are the kinds of questions I am asked, so let’s set about answering these questions and more.
Bees mostly eat and drink pollen and nectar from flowers, but there are some differences in bee diets depending on the age of the bee and species.
Pollen (mixed with a little nectar) is often stored as food for larvae and deposited in the individual egg cells of solitary bees, such as leafcutters and mason bees.
Pollen is a rich source of protein for bees, whilst the sweet nectar provides energy and also helps to maintain water balance in the diet.
There are a few exceptions - bees will sometimes find food elsewhere.
For example, honey bees have been noted to eat over-ripe fruit, and will sometimes eat the sweet secretions from extra-floral nectaries found on the green leaves of plants and shrubs. They may even eat the sweet secretions of other insects, notably aphids.
Bees are vegetarian and vegan..... mostly! But even here, there are (believe it or not!) rare exceptions in some parts of the world, with a small group of bees known to eat meat - more about this later!
However, most of us, however, think of bees feeding from the flowers of herbs, cottage garden plants, trees and shrubs.
Adults mostly eat nectar with a little pollen, though queens may consume more pollen, at least initially.
Queen bumble bee species emerge from their winter snooze, and the first thing they must do is find food to replenish their energy levels and sustain them as they establish their colonies.
Nectar will provide lots of energy. As the queen establishes a nest for raising her colony, she builds a little pot made from wax close to the brood cells. In it, she stores nectar that she will eat to sustain her whilst she incubates her eggs.
Pollen is not only a rich source of protein, it contains certain chemical compounds which help the ovaries of the impregnated queen to develop. Later, when the eggs have been laid and develop into larvae, the larvae initially eat pollen the queen has stored for them, but as they grow and develop, they eat regurgitated nectar and pollen fed to them by the queen and fully grown adult workers. Read about the life cycle of bumble bees.
The main diet of adult honey bees is nectar and pollen. Larvae are fed royal jelly which is a protein-rich secretion made by young worker bees. It comes from the hypopharyngeal glands, which are a pair of long glands coiled in the sides of the head.
The amount fed to the larvae depends on their future role in the colony. Grubs destined to become workers are fed bee bread (a substance
made from honey and pollen) and just a little royal jelly, whereas those
destined to become queens will be fed only on royal jelly. Drones (males)
are fed a little more of this special food than workers.
Honey is nectar stored by honey bees in wax honeycombs, that has undergone a process to turn it into honey. The honey is then intended to feed the colony through the winter when fewer flowers are available for food, and weather hinders bees from going out to forage. See: why bees make honey.
(Note that bumble bees do not store honey for winter as honey bees do. I discuss elsewhere the question of whether bumble bees make and eat honey).
Bees kept by beekeepers may at times be fed sugar. You can read more about that why beekeepers feed sugar to bees.
Honeydew is a sugar-rich sticky liquid, secreted by aphids and some scale insects, as they feed on plant sap. When food is scarce, bees may eat it to survive and sustain them (that includes honey bees and bumble bees) as a substitute for nectar, although it is believed to be not as nutritious.
Below is a wonderful photograph kindly sent to me by Valerie Nicolson. She says the honey bees are very active feeding on aphid honeydew on the underside of the leaves of her lime and lemon trees!
Thank you Valerie!
No, sometimes bees eat nectar from extra-floral nectaries found on leaves and stalks of plants. One year, I watched bumble bees feeding on extra-floral nectaries on the underside of green laurel leaves. I should point out that we were in a forest, and at that particular time, there was little in flower. This is fairly common behaviour, including among honey bees and wasps.
A tip for gardeners: as far as possible, try to select plants that provide food for pollinators. Many herbs and cottage garden plants are great for bees, but there are also plenty of shrubs, climbers and trees.
In fact, honey bees have certainly been observed to feed at very ripe fruit, including apples, plums, grapes, peaches, and pears.
No. I have been asked this question, and I am not aware of any example where this is the case. I assume the person was curious because they had been watching wood boring bees or carpenter bees: presumably, they may have observed bees excavating their nest holes in pieces of wood, by chewing and gnawing at the wood.
Although it is very uncommon and the vast majority of bees are vegetarian, I am certainly aware of a very small number of tropical species (notably in Panama) which actually do this! They are known as 'Vulture bees'. One of the Vulture bee species – certainly Trigona hypogea, has been observed to eat dead lizards and dead insects. Again, you can read more about this on the link 'Do Bees Eat Meat?'.
They don’t, but I can understand why some people think this is the case. What is happening here is that some species - typically mason bees - are collecting mud with which to help build their nests - but they are not eating the mud.
Alternatively, it may also be possible that the bee species being observed is actually excavating a nest by burrowing a tunnel into the ground, but again, the bee is not actually eating the dirt.
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