Nature

Australian Flora on Postage Stamps Home Page
Information and illustrations of all Australian postage stamps depicting Australian flora. Site by the Australian National Botanical Gardens
http://www.anbg.gov.au/stamps/

Bears on Postage Stamps
Bears on Postage stamps. Useful information on bear species
http://www.bearstamps.com/

Beetles on stamps
A site about Beetles on stamps listed by family and country.
http://patrice.bonafonte.free.fr/coleos/index_us.html

Bone and Stone, Echoes of the Past in Philately
Philatelic exhibit dedicated to the Neandertal and their world. It includes other prehistoric men and stoneage cultures using material from stamp collecting to illustrate the theme.
http://www.boneandstone.com

Cats on Stamps
Collection of Cat on stamps indexed by country
http://www.catsonstamps.nl/

Catstamps Mailing List - Everything on Feline Philately
Yahoo Group for thematic collectors interested in Feline Philately (Cats - domestic and wild)
http://groups.yahoo.com/group/catstamps/

Cryptozoology and Philately
Explore the fascination world of Cryptozoology
http://www.pibburns.com/cryptost.htm

Crystallographic Philately
Stamps in 'Crystallography News'
http://bca.cryst.bbk.ac.uk/bca/cnews/phil/stamps.html

Diamonds on postage stamps
Diamonds on postage stamps (Antwerp Diamond Museum)
http://www.provant.be/diamant/nl/diamant_op_postzegel_deel_1.htm

Dinosaurier und Fossilien
Fossils and Dinosaurs on stamps.
http://www.ggwinter.de/wstamps.htm

Dogs on Stamps
A collection of dog stamps worldwide in every breed
http://www.animalstamps.com/

Dolphins on Stamps
Stamps of Dolphins
http://www.geocities.com/SoHo/Museum/5968/de.htm

Ecophila
Indonesian stamp issues related to the environment.
http://www.indonesianewsonline.com/s/stamps/ecophila/

Entomophila - Invertebrates on Stamps
Invertebrates on Stamps
http://www.chez.com/entomophila/

Federal Duck Stamp Program
Federal Migratory Bird Hunting and Conservation Stamps, commonly known as “Ducks Stamps,” are pictorial stamps produced by the U.S. Postal Service for the U.S. Fish and Wildlife Service. They are not valid for postage
http://www.fws.gov/duckstamps/

Fish stamps
A scientifically indexed site on Fish stamps as part of a larger site on fish. Good reference material
http://www.fishbase.org/photos/CountryStampsList.cfm?country=608

Frogs on Stamps
Frogs of the World on Postage stamps
http://pws.prserv.net/ishii/frog/frog0.html

Geology on stamps
Geostamps - geology, mineralogy and paleontology on post stamps.
http://www.geo.uw.edu.pl/HOBBY/STAMP/stamps.htm

Giant Panda Stamps
Giant Panda on Stamps
http://www.pibburns.com/cryptost/panda.htm

Horse Stamps
Unique Collection of Horse Stamps from the World.
http://horse-stamps.narod.ru/index-en.html

The Illustrated Catalogue of Dinosaur Stamps
An illustrated catalogue of postal stamps featuring dinosaurs.
http://www.filaposta.com/dinosaurs/

Isreali Birds
Stamps of Isreali Birds listed by Family, Latin and English names
http://my.ort.org.il/holon/birds/index.html

Just Animal Stamps
Worldwide collection of beautiful fauna stamps.
http://justanimalstamps.tripod.com

Meteorite Stamps and Coins
Stamps and Coins on Meteorites, Comets and Craters
http://www.pibburns.com/catastro/metstamp.htm

Mineral, Rock, and Gem Postage Stamps
Topical stamps that feature minerals, rocks, and gems.
http://stampmin.home.att.net

Minerals & Gems on Stamps
Stamps on Minerals and Gems
http://www.fortunecity.com/marina/marine/335/

Mushroom Stamps
A webpage on Mushrooms on Stamps
http://www.plant.uga.edu/mycology-herbarium/stamps.htm

National Birds on Stamps
National Birds of the world on stamps
http://www.nzbirds.com/more/national.html

Newfoundland Dog Stamps
Stamps on Canada's gentle gaints - The Newfoundland Dog
http://www.hdserv.com/newfstamp.htm

Owls on Stamps
An Owl lover's Stamps page
http://mikeduggan.tripod.com/frames.html

Philatelic Mineralogy -- Gem, Rock, and Mineral Postage Stamps From Around the World
Gem, Rock, and Mineral Postage Stamps Arranged by Country and Mineral name with information.
http://stampmin.home.att.net/country.htm

Prehistoric life on stamps
Prehistoric life forms and fossils on stamps, indexed by species with catalogue numbers
http://home.hetnet.nl/~tonveijd/

Reptile-Stamps
Collection of Reptile and Amphibian stamps listed by species and country.
http://www.reptile-stamps.de

Rhinoceros on stamps
Rhinoceros on stamps
http://www.chez.com/buoro/english/english.htm

Rock and Fossil Stamps of the United States
Rock and Fossil Stamps of the United States
http://www.rockhounds.com/rockshop/stamps/united_states/united_states_toc.html

Roses on postage stamps
Images and lists of Rose stamps of the world
http://www.rosestamps.com/

Sea Turtle Postage Stamps of the World
Dedicated to Sea Turtle Postage Stamps of the World indexed country and species wise.
http://www.2xtreme.net/~nlinsley/

Seals and Whales on stamps
Stamps of Seals and Whales
http://mitglied.lycos.de/sealsonstamps/

Snorkeling, Scuba Diving & Underwater Exploration on Stamps
Stamps on Snorkeling, Scuba Diving and Underwater Exploration.
http://www.bsac854.org/stamps/

Sobralia & Stanhopea Orchids on Stamps
A complete listing of all known Stanhopea and Sobralia orchids on stamps, with photos.
http://www.geocities.com/avosite/Sobralia/Sobralia_TheStamps.html

South African Birds on Stamps
Stamps featuring Southern African Birds, particularly those birds that appear in "Roberts Birds of Southern Africa".
http://www.sabirdstamps.com/

Stamps on International Year of the Ocean
A UNESCO site
http://ioc.unesco.org/iyo/activities/special_stamps.htm

Theme Birds on Stamps
Information related to collecting birds on stamps. Presenting BirdStamps - the complete listing of whole world bird stamps issues.
http://www.birdtheme.org/

Tits and Chickadees on Stamps
Information about titmice, birdhouses and stamps with titmice.
http://home.wanadoo.nl/madelen.essens/english/

Volcanoes on stamps
Volcanoes on stamps with regional valcanoe maps
http://www.iomoon.com/

WWF Giant Panda Philatelic Numismatic Cover PNC
WWF PNC of giant panda.
http://www.mannydarnell.com/PNC.html