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. 2016 Sep 26;371(1704):20150384. doi: 10.1098/rstb.2015.0384

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© 2016 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 3. — The relationships between power input (P_i) and body mass (M_b). Least-squares regression analysis was used for (i) minimum power input (P_im) of seven species of birds during forward flapping flight in a wind tunnel; H, hummingbird Colibri coruscans; B, budgerigar Melopsittacus undulatus; S, starling Sturnus vulgaris; K, American kestrel Falco sparverius; LG, laughing gull Larus atricilla; FC, fish crow Corvus ossifragus; P, pigeon Columba livia; WNR, white-necked raven Corvus cryptoleucus, where . (ii) Small mammals during maximum sustainable exercise where . (iii) Resting non-passerine birds where [1].

Inline graphic — The relationships between power input (P_i) and body mass (M_b). Least-squares regression analysis was used for (i) minimum power input (P_im) of seven species of birds during forward flapping flight in a wind tunnel; H, hummingbird Colibri coruscans; B, budgerigar Melopsittacus undulatus; S, starling Sturnus vulgaris; K, American kestrel Falco sparverius; LG, laughing gull Larus atricilla; FC, fish crow Corvus ossifragus; P, pigeon Columba livia; WNR, white-necked raven Corvus cryptoleucus, where . (ii) Small mammals during maximum sustainable exercise where . (iii) Resting non-passerine birds where [1].