Birds
Examples
Tyto alba (bottom left), Struthio camelus (bottom middle), Anas platyrhynchos (bottom right)
Tyto alba (bottom left), Struthio camelus (bottom middle), Anas platyrhynchos (bottom right)
Evolutionary Milestones
Birds posses nine evolutionary milestones: eukaryote, tissues, bilateral symmetry, body cavity, enclosed body cavity, hollow nerve tube, backbone, legs, and feathers.
Habitat
Birds can live in many different habitats. They can be found all over the world.
Anatomical/ Structural Features
Birds have feathers, a backbone, and legs. They have wings and thin hollow bones that allow them to fly. their sternum is keel shaped. Their four chambered heart is used for their closed circulatory system. Their respiratory system consists of lungs, anterior and posterior air sacs. They have a well developed nervous and sensory system.
How do they acquire nutrients
Birds are heterotrophs. They can be herbivores or carnivores.
What do they eat
Birds eat a variety of things. Some eat plant while other eat small invertebrates.
What eats them
Reptiles, amphibians, and mammals prey upon birds.
Symmetry
Birds have bilateral symmetry.
Mobility
Birds are known to get around by flying. Although some birds, like the penguin and ostrich, cannot fly. They must walk using there legs, Some birds can even swim.
Reproduction
Birds reproduce sexually by internal fertilization. They lay an egg with a hard shell. They must incubate their eggs to keep them warm. Their eggs are amniotic.
Development
Birds start off as an eggs and then hatch into a chick. Next, the become a juvenile and finally an adult.
Other Information
Birds are warm blooded. Some other their adaptations include: feather legs and feet, large eyes, acute sense of hearing, and sharp claws, and long beaks.
Birds posses nine evolutionary milestones: eukaryote, tissues, bilateral symmetry, body cavity, enclosed body cavity, hollow nerve tube, backbone, legs, and feathers.
Habitat
Birds can live in many different habitats. They can be found all over the world.
Anatomical/ Structural Features
Birds have feathers, a backbone, and legs. They have wings and thin hollow bones that allow them to fly. their sternum is keel shaped. Their four chambered heart is used for their closed circulatory system. Their respiratory system consists of lungs, anterior and posterior air sacs. They have a well developed nervous and sensory system.
How do they acquire nutrients
Birds are heterotrophs. They can be herbivores or carnivores.
What do they eat
Birds eat a variety of things. Some eat plant while other eat small invertebrates.
What eats them
Reptiles, amphibians, and mammals prey upon birds.
Symmetry
Birds have bilateral symmetry.
Mobility
Birds are known to get around by flying. Although some birds, like the penguin and ostrich, cannot fly. They must walk using there legs, Some birds can even swim.
Reproduction
Birds reproduce sexually by internal fertilization. They lay an egg with a hard shell. They must incubate their eggs to keep them warm. Their eggs are amniotic.
Development
Birds start off as an eggs and then hatch into a chick. Next, the become a juvenile and finally an adult.
Other Information
Birds are warm blooded. Some other their adaptations include: feather legs and feet, large eyes, acute sense of hearing, and sharp claws, and long beaks.