Above: Bombus pascuorum on Bee Balm (Bergamot)
When I was a small child, I thought they looked cute and cuddly too, so much so that I somewhat clumsily tried to handle one.
Unfortunately, I had no idea how to approach such a creature, no idea about the wisdom of leaving them alone, and at that stage, I didn’t know they could sting!
Well of course, I was stung! As tolerant and docile as bumblebees are, they have their limits, and being handled by a clumsy (if well-meaning)
child, was obviously beyond that limit! I recall crying my eyes out, because my sister told me the bumblebee would now die, because it had stung me, and this would cause the body to be ripped apart! Years later, of course, I know that bumblebees do not die if they sting you. You can read more about this topic here.
That said, stinging by bumblebees is very, very rare. A child is far more likely to be hurt through falling over. The same goes for adults: put it this way, I’ve been bumped 3 times in my car, but for all my years of observation and activity with bees, I have only been stung once!
For many of us, these beautiful little creatures hold a special place in our hearts. Who could imagine a summer without them, buzzing gently from flower to flower? I don't know about you, but I can spend hours watching them on the lavenders - like this one below - Bombus terrestris (the Buff-tailed Bumblebee).
Well firstly, all of the species belong to the genus Bombus and to the family Apidae.
There are social as well as cuckoo bumblebees (social parasites). Cuckoo species are regarded as parasites, whereby the female cuckoo kills the host queen and takes over the nest – although some research has found cuckoos living alongside their host, with both rearing offspring.
They have their fair share of natural predators too, but without a doubt, human activity is the biggest cause of problems faced by this important little pollinator.
Incidentally, bumblebees vary in their choice of nest site. Some prefer to nest on tussocky grass clumps, others will choose an abandoned rodent hole, or a crevice in a wall. Some will even nest in the compost heap, or in a bird house. You may, early in the season, witness large bumblebees bumping up against the window of your home as they seek a nest site.
Although we have much to learn about bee pollination, we do know that bumblebees are perfectly designed for this task! As their furry, fat bodies enter flowers, much pollen is caught on their fluffy coats, and so is easily transferred from the male anthers of a flower, on to the female part of a flower, known as the stigma.
Any remaining pollen on their furry coats can be combed from their bodies, formed into a little ball, and stored in the bee’s pollen baskets – or corbicula, to be carried back to the nest.
Different species have different tongue lengths too, resulting in varied foraging preferences. All this means that some species are better adapted to pollinate certain plants than others.
Add this to the fact that they can ‘buzz pollinate’, and you begin to see why this insect is so important to both the environment and humans.
Without a doubt, they perform an important service as pollinators in our gardens, and increasingly in large scale food crop production such as tomatoes, soft fruits (like strawberries, cranberries), as well as pollinating beans, peas, wildflowers and many other types of plant life.
furry, and having evolved in the Himalayas, the bumblebee is also well
adapted to comparatively cooler weather conditions. They generate heat by vibrating their flight muscles, hence
performing a ‘warm up’ before venturing out during the cooler seasons,
even when other insects are still in hibernation. Read more about the bumblebee lifecycle.
In the UK, bumblebees may appear in February or March, pollinating the likes of crocuses, rosemary and pussy willows. However, they have also been seen out and about at Kew Gardens, London, in January!
Some species will
provide a late season plant pollination service. Bombus pascuorum, the Common Carder bumblebee (as seen at the top of the page), may even be around as late as November. To find out more about
this topic, why not read my page about bumblebee pollination
In order for these sturdy little pollinators to thrive though, they need a good supply of nectar and pollen rich foods. Of course, we can all do our bit to help them during the cold winter months, when they are especially vulnerable, by providing year round flowering plants. You can certainly help bees generally by ensureing you have plenty of bee plants in your garden.
Worldwide there are about 250 known species. Unfortunately, relatively little attention has been paid to these most vital pollinators, in comparison with, say the honey bee, which has been studied extensively.
We do know, however, that in the West particularly, worrying declines in populations are now being noticed.
North America has 50 native species. Of which 4 species that were formerly common, have hit catastrophic declines, with two possibly on the brink of extinction. These 4 species are:
- Bombus affinis
- Bombus terricola
- Bombus franlini
Worrying declines have been noted in a large number of other species, including:
Read about Bumblebees of North America.
You can read more about bee declines here.
At the time of writing (2010) in the UK, 3 species have become extinct. These are:
- Bombus subterraneous
- Bombus pomorum
- Bombus cullumanus
Of the remaining 24 species, 2 are critically endangered, and 10 are in very serious decline, which includes 6 Biodiversity Action Plan species.
Read more about British Bumblebees.
Well what could the consequences be? Why should we care? (Apart from the fact that they are beautiful creatures and deserve their place on earth?). Well all bees are important - here are 10 reasons why bees matter.
But anyway, we could probably expect some loss of plant variety, awith a further knock on effect on the eco system. But what about food? Well here’s an interesting lesson from China:
In China, in valleys where bumblebees used to pollinate groves of pears, they have been driven out by pesticides. Efforts to bring in honey bees for pollination were not successful. Unfortunately, it does not necessarily follow that one bee can replace another in terms of the pollination service provided!
These pear crops are now being
pollinated by humans – literally, humans are now going up into the pear
trees, to pollinate them by hand! Can you imagine the impact on world
food if this problem became global?! If we lost our bumblebees (and of
course, our other bees), we would be in serious difficulty, let’s not
underestimate it! See my page about the general importance of
Unfortunately, there is relatively little research into:
But, as stated, we do know that not all bees (or insects) pollinate all plants
effectively - even if they take their nectar! We cannot simply take it for granted
that if one species dies out, something else will 'do its job' instead.
Although some common plants are pollinated by more than one type of bee (or insect) but that is certainly not the case with all.
Of course, there is much we can all do to help all bees, including the bumblebee - but we need to act QUICKLY.
Please help spread the word!
Here are some pages you might like to share:
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