Figure 3.

Comparison of wing structure in (a) Eocypselus rowei (WDC-CGR-109), (b) an extant swift (Apodidae: Hirundapus caudacutus: University of Washington Burke Museum, UWBM 47230) and (c) an extant hummingbird (Trochilidae: Archilochus colubris: UWBM 49825), with overall body outlines at right. Skeletal elements (right side) and spread wings (left side) from the same specimen were outlined and traced, with wings mirrored to create images for extant taxa. For the fossil taxon wing length was reconstructed from the leading primary, and dotted lines indicate the uncertain breadth of the wing. For comparison, wings were scaled to the same skeletal wing length and body outlines to the same head-to-tail length (excluding the long beak of the hummingbird).