@dave_hone @SkyeMcDavid
thought A: if pterosaurs used complex flight maneuvers as socio-sexual display, would that contribute to this odd sternum variation?

There are living birds that use complex flight maneuvers in social-sexual display, do they have odd variation in their sterna?

thought B: teeth are highly functional, and yet in some groups (mammals, for example) also highly variable. Could sterna variation be useful for chasing down particular types of prey?

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@dave_hone @SkyeMcDavid
thought C: thermal soaring involves a lot of circling, necessary to stay close to the center of the thermal, where the rising warm air is strongest. Do thermal soarers have asymetric articulations between their coracoids and their sterna?

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@llewelly @dave_hone @SkyeMcDavid

Do those birds always turn in the same direction?

Could they turn clockwise in the Northern Hemisphere, counterclockwise in the South?

Could it be clockwise on Mondays, Wednesdays, and Fridays, counterclockwise the other weekdays, and resting on Sundays?

@llewelly @dave_hone @SkyeMcDavid

Indeed, my recollection of the local vultures if that in a group they all circle in the same direction. But cannot recall whether it is always the same.