How Long Do Bees Live Without Food or Water?

How long do bees live without food?

How long do bees live without food? A single honey bee, not long — about half a day to a day. In a study of isolated nurse bees given water but no sugar, deaths rose sharply between 9 and 12 hours and more than 40% had died by 12 hours (Shah et al. 2018). Foragers caught at a feeder and fasted for longer than 24 hours had high mortality (Gonzalez et al. 2024). The tool above uses those two studies for its 9–24 hour range.

The reason is fuel. Bees run on the sugars in nectar and honey. A colony is different: it stores honey, so the hive as a whole can go months without foraging while individual bees eat from the stores. That's why this page has two parts — one bee, and a whole colony.

Bumble bees and other bees

We found no study that timed bumble bees or solitary bees with water but no food, so the tool doesn't give a number for them. What is known is how they compare without food and water: in a dry chamber at 25 °C, bumble bees lasted 19.5 hours on average and sweat bees 39.5 hours, against 12.3 for honey bees (Burdine & McCluney 2019). Bumble bees also cope with cold, wet spells by keeping still and saving energy (Bumblebee Conservation Trust).

How long can a bee survive without water?

How long can a bee live without water depends on whether it still has sugar. Two measurements frame the answer:

• No water and no food, in dry air: honey bees survived 12.3 ± 6.85 hours, bumble bees 19.5 ± 2.65 hours and sweat bees 39.5 ± 8.03 hours at 25 °C and 0% humidity (Burdine & McCluney 2019).
• Sugar syrup but no extra water: caged honey bees fed 50% sugar syrup with no water had a median lifespan of 15 days; given tap water as well, the median was "greater than 21 days" and 67% were still alive at day 21, against 12.5% without water (Nearman & vanEngelsdorp 2022).

So dry air kills a bee with nothing to drink within a day, while a bee with sugar syrup survives much longer, because the syrup is itself half water. Colonies collect water too: water gatherers spread droplets on the combs to cool the hive by evaporation (Stabentheiner et al. 2021).

How long can a bee survive without its hive?

How long can a bee live away from its hive? A honey bee worker away from the hive is a forager, and she can feed herself on flowers, so her limit is her own remaining life: "the average life expectancy of a bee entering the forager stage is an additional seven days" (Dukas 2008, via deJong 2024). She can't get through a winter alone, though: honey bees survive winter as a cluster that keeps itself warm on stored honey (UF/IFAS).

Bumble bees are more independent. Males leave the nest for good and spend the rest of their lives on flowers (Bumblebee Conservation Trust), and a worker lives about four to six weeks in all (Bumblebee Conservation Trust), whether or not she gets home. Queens survive the winter alone — that's how every bumble bee colony starts (University of Wisconsin).

How long can a colony survive without stores?

How long can a bee colony survive without honey stores? Not through a winter: "one of the leading causes of colony death during the winter is lack of food" (UF/IFAS). We found no study that times how many days a colony lasts once its stores run out, so the colony mode doesn't give one. What it does is compare your estimated stores with the one sourced guideline we found.

How much honey does a colony need for winter?

"Generally, there should be about 90 pounds of honey reserves for a colony in the North, because bees will not be able to forage in the winter" (UF/IFAS) — about 40.8 kg. The same guide suggests a simple check: try to lift the back of the hive with one hand. "If the hive is difficult to rock forward with one hand, then it likely has enough food reserves to survive winter. If the hive is easy to lift, then it probably needs more food" (UF/IFAS). Colonies in milder climates may need less, but we found no research-based figure for them, so the tool doesn't judge mild-climate stores.

• Where the honey is matters. The winter cluster "will move up through the colony as a unit, slowly eating through their honey stores", so food has to be above and beside the cluster (UF/IFAS).
• Colony size matters. 25,000–30,000 bees is "an adequate size for overwintering success"; colonies with fewer than 15,000 "are not likely to survive freezing temperatures" (UF/IFAS).
• Leave them alone. In winter, open the hive only briefly and only on days above 50 °F (10 °C) (UF/IFAS).
• Ask locally. Your beekeeping association or Extension apiarist knows the local flows and how much honey colonies need where you are; they're the right people to ask before feeding or combining colonies (UF/IFAS).

Helping a tired bee

A bee sitting still on the ground isn't always in trouble. "If you find a bumblebee that isn't flying, it might just be resting, particularly if it's a queen bumblebee in spring"; queens studied by Queen Mary University of London rested for about 30 minutes, sometimes up to 45 (Bumblebee Conservation Trust). If a bee has been grounded much longer:

1. Move it to a flower first. "Gently move it to a nearby bee-friendly flower" (Bumblebee Conservation Trust).
2. Sugar water only as a last resort, "when there are no bee-friendly flowers around": a 50/50 mix of white sugar and water, "a drop or two … on a spoon or similar" offered to the bee's head (Bumblebee Conservation Trust).
3. Never honey or brown sugar. "Brown sugar is harder for bumblebees to digest and honey can contain pathogens which might make the bumblebee ill" (Bumblebee Conservation Trust).
4. Don't take it indoors. Bumble bees "need to be outside to feed, nest, and mate successfully" — if you find one in bad weather, move it somewhere sheltered outside (Bumblebee Conservation Trust).

The Trust's guidance is written for bumble bees, but the same gentle approach suits any tired bee. For a bee trapped indoors, see how long a bee can live inside your house.

How this tool works

• No food (with water): honey bee 9–24 hours (Shah et al. 2018; Gonzalez et al. 2024). Bumble bees and other bees: not measured.
• No water (with sugar): honey bee median 15 days in caged studies (Nearman & vanEngelsdorp 2022). Others: not measured.
• No food or water: mean ± one standard deviation in dry air at 25 °C — honey bee 5.5–19.2 hours, bumble bee 16.9–22.2, sweat bee 31.5–47.5 (Burdine & McCluney 2019).
• Away from its hive: honey bee forager about 7 more days on average (Dukas 2008); bumble bee worker at most about six weeks in total (Bumblebee Conservation Trust).
• Temperature: the studies were done at about 25 °C or in incubators, so for cold (below 10 °C) or hot (30 °C and above) settings the tool adds a note instead of changing the numbers. The status bar shows the range on a 0–48 hour or 0–30 day scale.
• Colony stores: compares your estimate with the UF/IFAS northern guideline of about 90 lb (40.8 kg) and shows what the colony is doing that month. For mild winters it gives no verdict, because no sourced target exists.

These are research figures for bees in labs and managed hives; a bee in your garden may have more or less in reserve. Living bees are best helped outdoors, near flowers.

Frequently asked questions

For education. Bees are pollinators — never spray a swarm or a colony. For a swarm or bees in a wall, contact a local beekeeper, a certified bee-removal specialist or your Extension office (UGA Extension; Mississippi State). Follow your local apiculture or Extension guidance on varroa and colony care. If a sting causes trouble breathing, swelling of the face or throat or faintness, call emergency services.