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Jack-o'-lantern mushrooms (Omphalotus illudens) fruiting from a rotting log at Nachusa Grasslands oak savanna habitat in Illinois, U.S.

American bison (Bison bison) herd at Nachusa Grasslands tallgrass prairie habitat in Illinois, U.S.

Ring-tailed vontsira (Galidia elegans) in Madagascar

King ragworm (Alitta virens) in the White Sea, Russia

Guatemalan beaded lizard (Heloderma charlesbogerti) in Zacapa, Guatemala

Atlantic purse-web spider (Sphodros atlanticus) in Georgia, U.S.

Twin-spot goby (Signigobius biocellatus) off the coast of Sulawesi in Indonesia

Cloud forest at Udzungwa Mountains National Park in Tanzania

Noble chafer (Gnorimus nobilis) in Croatia

Broadclub cuttlefish (Sepia latimanus) off the coast of Komodo National Park in Indonesia

Gaur (Bos gaurus) at Periyar National Park in India

Sea squirts (Rhopalaea sp.) off the coast of the Maldives