The most frequently encountered owl is always pearl-spotted owlet Glaucidium perlatum, photographed here at Okaukuejo (Etosha).
Namibia always produces a handful of owls with little effort. Besides the species pictured here we also watched Verreaux's eagle-owl (Bubo lacteus) catching rodents under the spotlights at the Okaukuejo waterhole. An African marsh owl (Asio capensis) at the same spot on one night was my first sub-Saharan individual and barn owl (Tyto alba) showed here too. Spotted eagle-owl (Bubo africanus) eluded us yet again.
Halali (Etosha) is the spot for roosting owls, the security guys there can put you onto roosting birds like this southern white-faced owl Ptilopsus granti.