Movie 4.

Capillary experiment performed with a single galea of a dead hawkmoth. The galea is positioned at an angle to the camera, showing simultaneously the food canal and the outside of the proboscis. The single galea is lowered towards DI water, and the water rushes in the food canal as soon as the galea touches the water. Meanwhile, the contact angle on the external surface of the proboscis is lower and the water does not rise there.