Is a duck a land or water animal?
Duck is the common name for a large number of species in the waterfowl family Anatidae, which also includes swans and geese. Ducks are mostly aquatic birds, mostly smaller than the swans and geese, and may be found in both fresh water and sea water.
Terrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, spiders), as compared with aquatic animals, which live predominantly or entirely in the water (e.g., fish, lobsters, octopuses), or amphibians, which rely on a combination of aquatic and terrestrial habitats (e.g., frogs, or
- Aquatic animals may breathe air or extract oxygen that dissolved in water through specialised organs called gills, or directly through the skin. The term aquatic can be applied to animals that live in either fresh water (fresh water animals) or salt water (marine animals).
- Read about these animals that live in salt water:
- shellfish like lobsters and crabs.
- molluscs like oysters and clams.
- molluscs, octopus and squid.
- sea turtles.
- coral polyps.
- Many people think that flying squirrels, flying possums and colugos (flying lemurs, which actually aren't even lemurs) can fly. But, the can't. They can only glide for limited distances. The only mammal that is actually capable of powered flight is the bat.
Amphibians may be the most familiar animals that often live on land and in the water, but several other animals thrive in both domains as well, including crocodilians, turtles and even some fish.
- Amphibians are vertebrate animals that live both in water and on land. Frogs, toads and salamanders are examples of amphibians. Amphibians are able to respire through their skin, and the young of all species of amphibians begin life with gills in the water.
- This group of scaly-skinned, backboned animals includes snakes, lizards, crocodiles, hard-shelled turtles, and the tuatara, from New Zealand. Most reptiles live on land, but turtles, crocodiles, and some snakes live in water.
Living on land means reptiles can't rely on absorbing oxygen through their skin like amphibians. All reptiles have lungs they use for breathing -- even those who live most of their lives near or in water, such as crocodiles, must surface to breathe. Lungs allow reptiles to venture far away from aquatic environments.
- Reptiles: Snakes, lizards, turtles, tortoises, crocodiles, and alligators are all reptiles. Amphibians: Frogs, toads, salamanders, and caecilians are all amphibians. The Differences Between Reptiles and Amphibians: And turtles are reptiles, but they live in water.
- So birds aren't just closely related to dinosaurs, they really are dinosaurs! This is what most people mean when they say that birds are reptiles, although technically according to the phylogenetic system mammals are also reptiles. You may wonder why biologists have two systems of classification.
- Since uric acid isn't easily soluble in water like urea is, it probably isn't surprising that lizards (and birds) don't have a bladder. They excrete a watery suspension of uric acid along with the solids that are exiting the digestive tract. TL;DR - lizards don't pee, they poop like birds instead.
Updated: 3rd October 2019