The secondary feathers in a chicken wing form what?

The secondary feathers in a chicken wing, which are located behind the primary feathers, contribute to the overall shape and function of the wing, creating what is referred to as the wing-bay. This area is crucial for flight dynamics, providing lift and aiding in the bird's ability to maneuver through the air. The term "wing-bay" specifically indicates the structural aspect of the feathers and their arrangement that affects the wing's performance.

The other terms mentioned do not accurately describe the configuration formed by the secondary feathers. For instance, "wing-bow" could imply a curvature but does not capture the specific arrangement of feathers. "Wing-bar" typically refers to a visual feature seen on some bird species, which does not pertain to the functional structure of the wing. "Wing-carriage" usually relates to how the bird holds its wings when at rest or in motion, rather than the specific formation created by the secondary feathers. Understanding the term "wing-bay" helps in recognizing the critical role that feather arrangement plays in avian flight mechanics.