| Wing Character | Male | Female |
| Adult | Immature | Immature | Adult |
| Tertials | Three or four most distal mostly white with wide black margins on outer webs; two more proximal are black; all have bluntly pointed tips | Outer web of most distal is white with a wide black margin; others are dark gray with dark marginal stripes on one or more; tips are pointed and usually frayed | More distal are gray- white with wide dark marginal stripes |
| Greater tertial coverts | Most are white with smoothly rounded tips | All are dark gray-black and taper to tips which are usually frayed | All are shiny black with smoothly rounded tips |
| Greater secondary coverts | Do not completely cover dark bases of secondaries on normally spread wing |
| Proximal 2/3 is white to tips | Proximal 2/3 is white or gray at tips | Proximal 2/3 is white with a black band (sometimes poorly defined) at tips |
| Middle and lesser secondary coverts | Do not completely cover dark bases of greater coverts on normally spread wing |
| Entirely white | Dark gray with females slightly darker than males | Very dark gray to black |
