Hopping around on the ground and making little leaps into the air, presumably to catch insects. The first 11 photos show a narrow parabolic path taken by this bird as he/she leaps into the air and returns to the ground. Photo 6 shows the bird perfectly upright at the top of the parabolic arch.
Pale belly with dark streaks and a yellow spot. Wings are a blue gray with two white bars (these are the tips of the upper wing/shoulder feathers, which I think are called coverts ). White eye brow and a white line under the eye. When in flight, a bright yellow posterior/undertail is flashed (see last two photos of the bird taking off and flashing the bright yellow undertail).