There are 35 sub-species of Barn Owl. Barn Owls do not build nests themselves, but rely on a variety of nesting sites for laying their eggs. Tree cavities, rock ledges, chimneys & ledges in barns are among the sites that may be used & Barn Owls have sometimes been known to make their own burrows in riverbanks.
Organisms in biology are classified by this system: kingdom, phylum, class, order, genus, species. Kingdoms being the largest groups. Species is the smallest major group before they divide into sub groups. So Genus would be the next group larger if that is what you mean, but all the other groups would be larger as well.
5. kingdom-the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia. animal kingdom, Animalia, kingdom Animalia-taxonomic kingdom comprising all living or extinct animals.ther systems divide organisms into domains (eukaryotes, bacteria, and archaea) that replace or rank above kingdoms. 5. One of the three main divisions (animal, vegetable, and mineral) into which natural organisms and objects have traditionally been classified.