NFS = Not For Sale, but of interest
F1 Barn Swallow              F2 Barn Swallow,stick   F3 Black-capped Chickadee  F4 Carolina Chickadee,a
F5 Carolina Chickadee,b     F6 Carolina Chickadee,c      F7 Eastern Kingbird           F8 Eastern Phoebe
F9 Great Crested Fly.       F10 Ruby-crowned Kinglet       F11 Say's Phoebe         F12 Scissor-tailed Fly.
F13 Tree Swallow         F14 Violet-green Swallow      F15 Western Kingbird    NFS Mountain Chickadee
NFS Scissor-tailed Fly.     NFS Scissor-tailed Fly.       NFS Scissor-tailed Fly.     NFS Vermilion Fly., f
NFS Ruby-throated           NFS Rough-winged                  F17 Eastern Phoebe       F18 Eastern Phoebe
  Hummingbird                     Swallow                                     with catch,a                     with catch, b  
Not necessarily in alphabetical order:
F19 Barn Swallow, a         F20 Barn Swallow, b              F21 Barn Swallow, c        F22 Barn Swallow, d
F23 Cliff Swallow,a             F24 Cliff Swallow, b            F25 Ruby-throated Hummingbird