" Partridge was one of my favorite discoveries. During one early-morning exploration of Les Halles, Chef Bugnard stopped at a friend’s stall and, picking up a partridge, said, “Here you see a perdreau.” The generic name for partridge is perdrix, but a young roasting bird is a perdreau. He decided to demonstrate how to make the famous perdreau rôti sur canapé, a roast partridge on a crouton of its own chopped liver. Bending the tip end of the bird’s breastbone, he said, “Feel that. It bends a little at the end.” With some difficulty at first, because of the feathers, I felt the breastbone. It did indeed have about half an inch of flexibility at the tail end. The bird’s legs and feet were also subjected to Chef’s inspection: if there was a claw above the back of the heel, it was mature; youthful perdreaux have but a nubbin where the eventual claw will be, and their legs are not raddled by age. The feathers, too, tell something, since those of the young have a bit of white at the very tips. Picking up a mature partridge, a perdrix, he said, “When you feel a rigid bone from neck to tail, you have maturity.” A perdrix wants braising in cabbage, he said, and perdrix en chartreuse is the classic recipe. "

― Julia Child , My Life in France