Wing flapping space of hens of 4 different strains.

<p>Space occupied by hens of 4 different strains while wing flapping. Data are presented as means ± SEM, with minimum—maximum areas in parentheses (in cm²). Different superscripts indicate differences (<i>P</i> < 0.05) among the wing flapping areas used by different strains of hens. Triangles are used to depict minimum (dotted line), mean (solid line) and maximum (dashed line) widths and lengths (in cm) of hens of each strain while wing flapping. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0190532#pone.0190532.g003" target="_blank">Fig 3</a> for a description of how lengths and widths were measured during wing flapping.