species-examples
Binomials
West Midland Bird Club, lists of bird sightings and regional species lists.
More than binomials
Unsepcifeid species
Podiceps sp., on Bird Life
Sub-species
Animal
Larus glaucoides kumlieni, e.g. on BirdGuides
Plant
Pisum sativum subsp. sativum e.g. on [1] (also has other examples)
Variety (plant)
Pisum sativum var. macrocarpon e.g. on Dave's Gaden
Strain (bacteria)
Escherichia coli O157:H7 e.g. on FDA.gov