“Ostrich: A Life on the Run” (2015)
Seen in 2020.
Ostriches in the Namib and Kalahari deserts trying to get the timing right on the rainy season.
This must be a very late Jim Henson production, but I couldn’t find his name in the credits. The worldbuilding is a little more extreme than The Dark Crystal (1982), but I dig it. Very well shot and scripted, and the birds are amazing.
References here: “Down to Earth: Flightless Birds” (2016).