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I saw an Eastern Bumblebee on a Rattlesnake Master flower reared up on its hind legs and holding very still. There was a tiny beetle, likely a Silken Fungus Beetle, firmly clamped onto the bee's proboscis with its mandibles. These beetles practice phoresy: they live on flowers but attach to a leg, antenna, or mouthpart of a bumblebees and hold on until they are transported back to the bee's nest. There they lay eggs and the resulting larvae feed on organic debris in the nest. The bee held still for the entire 5 minutes or so that I observed it. I cross posted this under Eastern Bumblebee here:https://www.inaturalist.org/observations/128056037

This bee was reared up on its hind legs and appeared to be in distress. In the images there is a tiny brown beetle biting the bee's proboscis. They stayed this way for 5 or more minutes before I walked away. Edit: Looking into it, I think the beetle is Antherophagus ochraceus, the silken fungus beetle, which clamps onto bumblebees and hitches a ride back to the nest. The beetle lays eggs in the nest and the resulting larvae eat organic debris.