Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms (hierarchy name)
4. living organisms (entities)
5. Eukaryota (domain)
6. Animalia (kingdom)
7. Chordata (phylum)
8. Vertebrata (subphylum)
9. Aves (class)
10. Ciconiiformes (order)
11. Ardeidae (family)

Anotations

Scope note:

Members of a subfamily containing 12 living species of solitary marsh birds, allied to the heron, but with shorter neck and stouter body. Bitterns typically have a camouflage pattern of streaks of variegated brown and buff, and when they stand with their bill pointed upwards they are able dissappear among the reeds and grasses of their habitat.