Fig. 10. Wingspan ratio as a function of flight velocity compared among bird species. Values shown are means. Colors indicate species within the same order: Red=Trochiliformes, rufous hummingbird Selasphorus rufus (this study); blue=Columbiformes, ringed turtle-dove Streptopelia risoria (Tobalske et al., 2003b) and rock dove (`pigeon') Columba livia (Tobalske and Dial, 1996); green=Psittaciformes, budgerigar Melopsittacus undulatus and cockatiel Nymphicus nymphicus (Tobalske et al., 2003b); orange=Passeriformes, barn swallow Hirundo rustica (Park et al., 2001), thrush nightingale Luscinia luscinia (Rosén et al., 2004), black-billed magpie Pica hudsonica ¹Tobalske and Dial (Tobalske and Dial, 1996), ²Tobalske et al. (Tobalske et al., 2003b) and zebra finch Taeniopygia guttata (Tobalske et al., 1999).