In these plots, the position of a point relative to the center represents the compass azimuth
of the corresponding vector and the distance of the point from the center is proportional to zenith angle; this representation of the hemisphere is equivalent to the Hill projection of fish-eye lenses, except that east and west are not reversed as they are in the photographs (cf.
Furthermore, photographs were taken from different compass azimuths
. In most photographs, most flamingos were resting, standing, or grooming (stationary behaviours), only about 14 % (in Kenya) and about 26 % (in Europe) of the flamingos were assigned as performing locomotor activities.