There are diverse types of bees, however. Honeybees, bumblebees, orchid bees, etc are large groups that are quite distinctive in size, tongue length and behaviour (some solitary, some colonial). Thus generalization about bees is difficult. Some plants can only be pollinated by bees because their anthers release pollen internally, and it must be shaken out by buzz pollination. Bees are the only animals that perform this behavior.
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