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Fish

Have scales, live in the water, are cold blooded, have a diet of smaller organisms or algae, depending on the species, have a different life span, have a different body type, and can swim.

Birds

Have feathers, live in trees and forests (most, some like penguins don't), are warm-blooded, have a diet of insects and grain or fish (depending on the species), have a different life span, have a different body type, and can fly (most can, some swim, some walk).

Fish Attributes / Bird Attributes

Cold-blooded / Warm-blooded

Most swim underwater / Most fly in the air

They have scales and fins / Most have wings with feathers

They can breathe underwater / They have lungs

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Wiki User

14y ago
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Wiki User

8y ago

Both mammals and birds are classified as "warm blooded". However, there are very distinct differences.

  • Mammals have a covering of fur or hair, while all birds have a covering of feathers.
  • All birds lay eggs in order to reproduce. However, all mammals, with the exception of the two monotremes - the echidna and the platypus - give birth to live young.
  • Birds have bills, or beaks, which are made from keratin, and are quite hard. Mammals do not. Even the snout of a platypus, though often (incorrectly) compared with the bill of a duck, is leathery and pliable, and holding thousands of electroreceptors, which no bird's bill has.
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ProfBot

3w ago

Fish are aquatic vertebrates with gills for breathing and fins for swimming, while birds are terrestrial vertebrates with feathers for flight and lungs for breathing. Fish have scales covering their bodies, while birds have beaks and lay eggs. Fish reproduce by laying eggs externally, while birds typically lay eggs internally and incubate them until hatching.

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16y ago

Fish: Scales, gills, blind Mammal: Drink mothers milk as a baby, have little tiny hairs all over their body, are animals such as dolphins, whales and humans some are blind Birds: have beaks, fly, not blind, see miles and miles away (even if they are not flying)

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7y ago

Birds have feathers, mammals have hair or fur. Birds have porous, hollow bones, mammals' bones are denser and solid. Birds have wings, mammals have hands or paws or hooves. Birds lay eggs, mammals carry their young in a womb or pouch. Mammals feel their young with milk from mammary glands, birds feed their young by regurgitating partially digested material.
-birds have hollow bones and mammals have solid ones

-mammals give birth live, and birds give birth through eggs

-mammal babies live off their mothers milk, bird babies get food as soon as they are born

-mammal babies are often more than one at one birthing time, birds are born sometimes 2, but the stronger one either kills or pushes the other out of the nest

Mammals give birth to live young ones, while aves lay eggs. Also, mammals have mammary glands but aves don't.
Birds have feathers and wings, but not all can fly. They reproduce by laying eggs. The eggs then have to spend a period of time in a nest before the baby bird inside hatches and comes out into the world. Baby birds are usually fed by one or both parents having first to hunt the food, and then feed it to their newly hatched young.

Mammals have hair or fur instead of feathers. Except for bats, mammals do not have wings, they have limbs which they use for walking or climbing, or to carry or move something. Bats' wings in fact, are used as limbs, in that they use them to climb or move around with on the ground.

Mammals reproduce by giving birth to live babies, which then are fed by their mother's milk until they are able to eat whatever their parents eat.
There are several differences between mammals and birds. The differences that immediately come to mind are that mammals have fur or hair, and birds have feathers. Birds lay eggs, and mammals give birth to live young.

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13y ago

All mammals suckle their young. Fish do not suckle their young.

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Wiki User

12y ago

fish lives in water,while mammal lives on land

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Q: What are the differences between fish and birds?
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