Are Birds Mammals? 

No, birds are not mammals.

Characteristics of Birds

Birds have the following characteristics:

• Warm-blooded (endothermic)
• Feathers
• Lay eggs
• Have a lightweight but strong skeleton
• Possess a beak (no teeth)
• Have a four-chambered heart
• Possess a highly developed respiratory system.

Characteristics of Mammals

Mammals have the following characteristics:

• Warm-blooded (endothermic)
• Have hair or fur
• Produce milk to feed their young
• Have a four-chambered heart
• Have a unique jawbone structure
• Possess a neocortex, responsible for higher brain functions.

Difference Between Birds and Mammals

Birds and mammals are two distinct classes of vertebrates that differ in several key ways:

Birds:

• Have feathers
• Lay eggs
• Possess a beak (no teeth)
• Have lightweight but strong skeletons

Mammals:

• Have hair or fur
• Give birth to live young
• Produce milk to feed their young
• Possess a unique jawbone structure
• Additionally, birds have a highly developed respiratory system, while mammals have specialized sweat glands, and some mammals, such as whales and dolphins, have adapted to aquatic environments.

How To Attract Birds 

Similarities Between Birds and Mammals

Although birds and mammals are very different types of animal, they do have certain characteristics in common:

1. Vertebrates: both birds and mammals are vertebrates, which means that they have backbones.

2. Endothermic (warm-blooded): both birds and mammals are endothermic (warm-blooded). This means that they are able to regulate their own body temperatures, and maintain a constant body temperature. For example, warm-blooded animals are able to warm themselves up when cold (e.g. by shivering); they don’t need to move to a warmer location or bask in the sun like cold-blooded animals such as lizards).

3. Four-chambered hearts: the hearts of both birds and mammals have four-chambers. This is a more efficient system than the three-chambered hearts of amphibians and most reptiles.

4. Breathe air with lungs: both birds and mammals breathe air, although the lungs of birds and mammals are different. Birds have extremely complex respiratory systems, with air sacs as well as lungs.