Figure 4 in New fossil mousebird (Aves: Coliiformes) with feather preservation provides insight into the ecological diversity of an Eocene North American avifauna

Figure 4. Photograph and line drawing of Celericolius acriala (FMNH PA 730). Abbreviations: dI, pedal digit I; dII, pedal digit II; dIII, pedal digit III; dIV, pedal digit IV; f, furcula; lcmc, left carpometacarpus; lhu, left humerus; lra, left radius; ltbt, left tibiotarsus; ltmt, left tarsometatarsus; lul, left ulna; mpI-1, manual phalanx I-1; mpII-1, manual phalanx II-1; mpII-2, manual phalanx II-2; mpIII-1, manual phalanx III-1; py, pygostyle; rad, radiale; rcmc, right carpometacarpus; rest, artificially restored tip of the beak; rf, right femur; rra, right radius; rtbt, right tibiotarsus; rtmt, right tarsometatarsus; ruln, right ulna; sc, scapula; st, sternum; ul, ulnare; uln, ulna.