This illustration is based on the Short-eared Owl. At certain times of the year they will roost together in groups, sometimes as large as a couple hundred owls. So here they are among the grassy tussocks as the sun sets. These owls are mostly diurnal, meaning they are active in the day, so I suppose they are just settling down to sleep.
8×10 Print in the shop: https://www.etsy.com/listing/126432827/sleeping-owls-illustration-ink