closeup on a forest cuckoo bumblebee or four-colored cuckoo bee, bombus sylvestris on a white flower

wing wildlife wild white sylvestris summer solitary single season psithyrus pollinator pollination pollen parasite outdoors nature natural macro little keywords invertebrate insect hymenoptera hairy garden fourcoloured fourcolored forest flower flora environment entomology cuckoo closeup close cleptoparasite bumblebee bombus biology biodiversity bee beautiful arthropoda arthropod animal