Several species of ducks, geese, beavers and turtles, such as eastern painted turtles and common snapping turtles, eat duckweed. There are also several species of fish that eat duckweed, primarily grass-eating carp such as koi and grass carp, although grass carp will likely eat all other aquatic vegetation before moving on to duckweed.
Although Canada geese and mallard ducks eat duckweed, it is primarily domesticated waterfowl that tend to eat it, not wild species. Some snails, including stagnant pond snails, and gastropods also eat duckweed. Duckweed also provides shelter for a much greater number of species, including snakes, frogs, muskrats and a number of different fish.
There are three different species of duckweed: Wolffia, Lemna and Spirodela. Of the three, Wolffia can be eaten by humans and is quite nutritious. Because most duckweed grows in dirty water with high calcium levels, which the plant then absorbs, most Lemna species have very high levels of calcium oxalate, which can be dangerous for humans. Provided it is grown in clean water, Lemna could also be eaten by people. Lemna is often dried and used as feed for cattle, as it contains more than 45 percent protein and only a small amount of fat.Learn More
Among the animals whose names start with the letter "n" are the nutria, nyala, nanger, narwhal, needlefish, night sergeant, northern sennet, natal barred blue butterfly, night butterfly and Northern Jungle Queen. Other animals include the nuthatch, nightjar, northern mole cricket, nectar-sucking blister beetle and nine-spotted ladybird beetle.Full Answer >
A fox's bark is used to distinguish one fox from another, in the same way a human voice is used to tell two people apart. Foxes make a range of noises, including barks, screams, growls and howls. In the winter through spring seasons, during mating time, a fox will bark as a warning to other nearby male foxes to warn them from entering their territory.Full Answer >
There are about 78 types or species of whales, though this number ranges from 78 to 90 depending on the source. This group, called cetaceans, includes dolphins and porpoises, as well as whales.Full Answer >
The top 10 endangered animals in the world, as of December 2014, are the ivory-billed woodpecker, Amur leopard, Javan rhino, northern sportive lemur, western lowland gorilla, saola, leatherback sea turtle, tiger, Chinese giant salamander and the little dodo bird. Other critically endangered species include the mountain gorilla, northern right whale and the kakapo parrot.Full Answer >