Translated from Ecomare museum on Texel in the Netherlands today:
In 2009, 1820 barn owl couples were counted in the Netherlands, of which two on Texel. Barn owls like to eat common voles. This vole species is not present on the island. But since 2006 there are greater white-toothed shrews and barn owls think they are tasty as well. In 2014 there were 16 breeding pairs on the island, and 53 young owls hatched. Now 70 nesting boxes hang scattered across the island.
Texel barn owl rehabilitation: here.