[E] seals and polar bears National Wildlife Federation's page - all about polar bears 770kg considered to be marine mammals Polar bears National Wildlife Federation According to the NWF Save the Polar Bear NWF Polar Bear nwf.org polar bears [E] [E] the celebrated bruin the celebrated bruin seals and polar bears cuddly polar bears serious danger of becoming extinct Polar Bear - National Wildlife Federation Polar Bear - National Wildlife Federation National Wildlife Federation the first vertebrate species National Wildlife Federation