25 THOUSAND TOPICAL STAMPS birds, fish-marine-life, insects-butterflies, pets-farm-animals, reptiles-amphibians, wild-animals, animation-cartoons, architecture, art, cultures-ethnicities, famous-people, flags-national-emblems, holidays, military-war, music, nature-plants, organizations, royalty, science-technology, space, sports, transportation, aviation, motor-vehicles, ships-boats, trains-railroads,us-1800s-mnh