Why a duckbill platypus a mammal?
815908
Because it's warm-blooded,  has fur, and gives milk.  (Even though it also lays eggs, which is very un-mammalian, scientists just agreed to classify it that way because it's more like a mammal than anything else.)
599676
Great Egrets eat fish, frogs, and insects. They in turn provided sustenance for the other denizens of the wetlands such as perhaps a submerged alligator that takes it by surprise. More importantly they are beautiful animals attracting bird-watchers from all over the world to visit the habitats of these animals. This puts pressure on the community as these tourists provide revenue for hotels and businesses to protect the wetlands so the tourists will keep coming. So indirectly by just being a beautiful bird it helps out all the creatures of their habitats.
772515
An anthropod is the creature you are talking about.
995022
Actually there are technically 3.\nThe platypus, the short beaked echidna and the long beaked echidna (although I suppose the last two could be grouped together).  =0)\nthey are monotremes\nhttp://education.yahoo.com/reference/encyclopedia/entry?id=32104
232987
Part of the defining characteristic of a mammal is the presence of hair or fur.
57828
The whale. It is indeed a mammal.
757499
Its a marsh bird, in the rail family rallidae, people often mistake it for a duck as it is able to swim like a duck (duck family is anseridae). Coots lack webbing  but instead they have lobed toes which helps them padle along. http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/American_Coot_dtl.html
8691
A duck's quack will echo. The idea that it does not is a myth.
103715
Both birds belong to the family Anatidae, but have distinct characteristics.\n\nThe goose (male--gander) is a medium to large bird and makes a honking call. ("True geese" belong to the subfamily Anserinae.) Non-domesticated geese are very migratory, flying from far north to far south. Geese eat a vegetarian diet.\n\nhttp://en.wikipedia.org/wiki/Goose\nhttp://education.yahoo.com/reference/encyclopedia/entry?id=19498\n\nThe duck (male--drake) is smaller than the goose and the female often has a call more similar to "quack". (Contrary to popular belief, it does echo.) Ducks belong to several different subfamilies. Almost all domesticated ducks (excluding some in Central America) are descended from the Mallard, so they have very similar forms. Some duck species don't migrate, and some moult before migration, temporarily rendering them flightless. Many ducks eat fish, amphibians, and insects.\n\nLooks like biggest difference is if they honk or quack.
34312
alecithal, like most mammals.
2584
Cool question. They are gregarious (like groups) wading birds related to other large wading birds such as \nBoatbills, Shoebills, Hammerkops, storks, ibises and spoonbills.\n\nYou can find the scientific classification and their spot in the bird family tree at the link below!
241563
Bats are mammals and they do fly like birds.Squirrels can only glide a limited distance.
1070876
One of its leaves are both alike!\n\nBut I still don't understand ... why a duck?
790762
To find it's own identity as an individual and not be tied down by the animal community's labeling it as part duck and part beaver. To be noted for it's skills and not it's looks. In other words, to transcend the     labels, based on exaggerated stereotypes, that wildlife society has branded it with.
1172493
the platypus. seriously, what is that thing?
403447
I'm going with the platypus.
1003031
Birds belong to Aves..\nBats belong to Mammals order Chiroptera\nThere are estimated to be about 1,100 species of bats worldwide, about 20% of all mammal species.Out of the 1,100 about 70 percent of bats are insectivorous.\nThey have fur-----Many Birds lack.(Almost all)\nThey have Ultra sonic hearing capabilities-----Birds lack\nThey hang upside down-------Birds don't\nThey give birth to developed young ones----Birds lay eggs\nThey have OS-Penis-----Not present in Birds\nThey are gregarious animals.