What happens to bees during winter?

How do some of Britain's smallest residents survive the challenge of Winter?

As we move further away from summer and the days of autumn draw longer and colder you may well have noticed the disappearance of some of your favourite garden visitors. Winter provides a harsh challenge for survival for most species, but how do some of our smallest residents manage to make it through the colder months?  

Despite their fluffy jackets, bees find it especially hard to survive over winter and the 270 different species of bees that reside in the UK have developed a range of fascinating tactics to make it through to the warmer months.  

The majority of bees in Britain are solitary bees and will start their preparation to survive the winter several months before the temperature drops. During autumn female bees gather pollen and nectar for the nest, where they then lay their eggs. They then seal the nest to safely store their eggs with the collected pollen and nectar, which the young bees will consume as they develop into adults. For different species, however, this process will take place at different times.

a bee gathers pollen from a purple flower

Pollen bee © Jon Hawkins Surrey Hills Photography

Spring flying bees will develop into adults over the summer and spend the winter within a cocoon to emerge as early in the year as possible to take advantage of early flowering plants. Species that fly later in the year follow the same process but will spend the winter as larvae and develop into adults during late spring or summer. 

Although most bees will follow similar steps to survive the winter, Bumblebees have developed an entirely different tactic. Whereas other bee species will prepare for the whole colony to survive, bumblebees will only prioritise the survival of the queen - the rest of the colony will be left to die.

The queen bee will prepare for winter and mate with male bees from another colony and then build up their fat reserves by consuming nectar and pollen before finding a suitable place to hibernate. Often the queen will overwinter underground, but any dry place will be suitable as it reduces the likelihood of waking up early or getting attacked by fungi. Despite these preparations, however, only around half of these queen bees will survive the winter. 

The bees final winter preparations can be observed in many gardens, wildflower meadows, natural areas, as well as the various Hampshire & Isle of Wight Wildlife Trust nature reserves