"Herring often form huge schools and are important forage fish in marine ecosystems."

"When threatened, hedgehogs curl into a ball, protecting themselves with their sharp spines."

"Crocodiles are living fossils; their form has changed little over millions of years."

"Adélie penguins build nests with small pebbles and will fight or steal for high-quality stones."

"Catfish usually have several pairs of barbels around their mouths, resembling cat whiskers, used for sensing the environment and finding food."

"Stoats turn pure white in winter (tail tip remains black) to adapt to snow, known as ermine fur, once a symbol of royalty."

"Quokkas are known for their facial expressions that make them look like they are always smiling; they are small herbivorous marsupials."

"Marmosets are among the smallest monkeys, with long white or yellow ear tufts, and are highly social."

"Many eel species have migratory spawning habits; for example, European eels migrate to the Sargasso Sea to spawn."

"Flying fish have highly developed pectoral fins, allowing them to leap out of the water and glide for considerable distances to escape predators."

"The Bald Eagle is the national bird of the United States and has incredible eyesight, allowing it to spot prey from high altitudes."

"Nautiluses are ancient cephalopods with spiral external shells containing gas chambers to control buoyancy; known as 'living fossils'."

"Male hen harriers are greyish-white, females are brownish, they often fly low while hunting, and have a white rump patch."

"The Grey Heron is a large wading bird with a long neck, preying on fish, amphibians, and small mammals."

"Cougars are one of the largest cat species in the Western Hemisphere (second to the jaguar) and have incredible leaping ability."

"White Wagtails are easily recognizable by their black, white, and grey plumage and their habit of constantly wagging their tails while walking."

"Sparrows are highly adaptable, often nesting near human buildings, and are common urban birds."

"Hornbills have large casques on top of their beaks, varying in shape; females often seal themselves in tree cavities to incubate eggs."

"Goldfish are ornamental varieties developed from crucian carp through long-term artificial selection, with diverse forms and colors."

"The ostrich is the largest living bird species and also the fastest running bird, but it cannot fly."