I love Oystercatchers, and I find their displays mesmerising. I recently watched a video of piping Oystercatchers, which reminded me of this curious display in which two or more individuals display and inspired me to draw this sketch. During piping, the birds call excitedly with head pointing down, bill open, often walking or running in parallel. The carpal joints are partially open giving a hunched appearance. There is also some rapid change of directions, and head bobbing in a jerky fashion. Piping appears to be a type of contest, in which individuals assert or establish their dominance and resolve disputes about territory or food. The bowed position, and fluffed head feathers may be a way in which apparent size is increased and the parallel walk allows individuals to size and assess each other. Ink, pencil and watercolour on my Wacom tablet.