What is a pinion of the crow and raven?

In the context of birds, the term "pinion" refers to the outermost flight feather of a bird's wing. In comparison to the other flight feathers, the pinion is the longest and most robust. It plays a crucial role in flight, providing lift and propulsive force. The pinion is particularly significant for crows and ravens, as they are powerful fliers known for their soaring abilities. The outer primaries, also called the pinion, are particularly notable in crows and ravens and enable them to achieve rapid and maneuverable flight.