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Table 1.

Measurements of the uncinate process on the anterior rib that extends back a perpendicular distance (Q), the distance between the ribs (D), the distance of the posterior insertion (P) and the rib angle (θ) of the ribs in bird species representative of different types of locomotion

Barnacle gooseRazorbillKestrelRed-legged partridge
D (mm) 14.9±0.59 7.94±0.44 7.51±1.57 7.6±1.99 
P (mm) 4.54±0.43 13.08±1.29 3.79±1.91 3.81±1.13 
Q (mm) 7.21±0.43 10.50±1.3 4.50±0.36 3.87±0.50 
θ (degrees) 71.19±1.88 64.79±6.77 76.85±3.66 74.26±0.41 
Barnacle gooseRazorbillKestrelRed-legged partridge
D (mm) 14.9±0.59 7.94±0.44 7.51±1.57 7.6±1.99 
P (mm) 4.54±0.43 13.08±1.29 3.79±1.91 3.81±1.13 
Q (mm) 7.21±0.43 10.50±1.3 4.50±0.36 3.87±0.50 
θ (degrees) 71.19±1.88 64.79±6.77 76.85±3.66 74.26±0.41 

Species include the diving razorbill Alca torda; the non-specialists kestrel Falco tinnunculus and barnacle goose Branta leucopsis; and the walking red-legged partridge Alectoris rufa

Values are means ± s.e.m. (N=6–10)

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