Despite popular misconception that honey bees are only seen on warm days, they can, and do in fact, forage in cool temperatures. Some official sources state they will forage in temperature as low as 55°F (approximately 12.5°C), however, I have seen them out and about in temperatures even lower than this.
Likewise, in chapter 9 of his book, The Lives of Bees, Professor Thomas D. Seeley describes observations from cooler regions of the world, of thirsty honey bees collecting water in temperatures as low as 39°F (4°C).
However, genetic adaptation may play an important role in tolerance to cool temperatures and suitability to local environment as discussed below.
Honey bees are exceptionally important pollinators. Wilson and Messinger-Carrill note in their book Bees In Your Backyard:
Early in February 2019, my husband and I visited a beautiful garden managed by the National Trust in North Wales, UK.
The weather was bitterly cold, but the sun shone brightly in the sky. It was morning when we arrived and witnessed honey bees foraging on a range of early flowering shrubs (notably Sweet Box - also known as Christmas Box - Sarcococca confusa and Daphne bholua). Both of these winter flowering shrubs have what can only be described as a heavenly, sweet fragrance.
We discovered the bees came from a wild honey bee nest in a tree for which the National Trust created a small sign to inform visitors.
I sometimes read (and had been lead to believe) that bumble bee queens are always seen earlier in the year and in cooler temperatures than honey bees.
However, we saw no bumble bees out and about, and similarly, no solitary bee species were seen either.
Unfortunately I did not have a camera with me, and the only phone we had taken with us was back in the car. However, we managed to get back to the garden later that month on 27th February.
Again we arrived in the morning, the sun was not so bright as the earlier visit. The weather, according to the nearest weather station was 41°F (5°C) and reached 48°F (9°C) by 12 noon. I took photographs and film of the wild honey bee nest in the tree (above).
We observed honey bees primarily visiting Daphne, Erica / heathers, Rhodendron and Mahonia aquifolium.
A few bumble bee queens were also seen and to our surprise, Comma butterflies on the Daphne.
As a consequence of my observations from early last year, I have been especially keen to monitor the progress of the wild honey bee colony, firstly in the hope that it would survive and thrive and secondly, I was genuinely curious as to how early in the season the bees might be seen foraging, and again at what temperature.
As I write it's January 16th, and yesterday we were able to take a trip back to the beautiful garden to look out for the wild honey bees. We saw them, and we were pleased to observe that the nest was active.
It appeared they were no longer using the original entrance on one side of the tree, and instead had switched to a crevice on the opposite side.
No other bees species were seen yesterday, and no butterflies either.
Update: March 2021 - Visited the wild colony again. It appeared active and healthy. Honey bees can and do survive i Britain without beekeepers.
Whilst some honey bees may have the ability to forage in especially cool temperatures, for beekeepers it is worth finding out which honey bees are best adapted to thrive in particular geographical locations.
Scientist, beekeeper, author, and world authority on honey bees, Professor Thomas D. Seeley, makes some very important observations with regard to the genetic adaptations in this regard in his brilliant book The Lives Of Bees. Quoted from chapter 11:
It is of course, also worth providing winter flowering plants and shrubs for bees that can also thrive in your particular region.
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