Buff-tailed Bumblebee
Nikkor 200-500 VR/TC 14 III @700mm, f8, ISO 220, Nikon Z 6
Morning, crop (APS-H); Bumblebees are a tribe of colonial bees that have a common ancestor with honeybees and stingless bees tribes from about 90-100 MY ago in the dinosaur age. Their evolution converged with the expansion of dense leaf venation flowering plants.
The current data strongly indicate that the other tribe of pollen gathering bees, the orchid bees, are a separate branch (mostly solitary non-parasitic bees tribe). Unlike their close relatives, the bumblebees live in simple colonies and are quite hardy when it comes to low temperature (body hair and muscle action help).
The worker on blackberry flower is searching for nectar. There is stiff competition from butterflies, honeybees, wasps and other insects. You can see the slightly curved proboscis, relatively long with this bumblebee. The sucking is done by interval dipping using the energy-efficient capillary action it seems.
South East