|"Cream-coloured Courser" by Shah Jahan - Own work. Licensed under CC BY 3.0|
They are Cream-coloured Coursers, Cursorius cursor. I'd never seen one before but my brain must have absorbed their image and name from the bird books I've looked at over the years because the name 'courser' came immediately to mind.
There are other coloured coursers, of course, but they are not named by their colour, if you see what I mean. (e.g. Temminck's courser.)