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Animal world

Animal world. Different kinds of Animals. Land animals (terrestrial animals).

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Animal world

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  1. Animal world Different kinds of Animals

  2. Land animals (terrestrial animals) • Many animals considered terrestrial have a life-cycle that is partly dependent on being in water. Penguins, seals, and walruses sleep on land and feed in the ocean, yet they are all considered aquatic. Many insects and all terrestria crabs (as well as other clades) have an aquatic life cycle stage: their eggs need to be laid in and to hatch in water; after hatching, there is an early aquatic form, either a nymph or larva. • There are crab species that are completely aquatic, crab species that are amphibious, and crab species that are terrestrial. Fiddler crabs are called "semi-terrestrial" since they make burrows in the muddy substrate, to which they retreat during high tides. When the tide is out, fiddler crabs search the beach for food. The same is true in the Mollusca : many hundreds of gastropod genera and species live in intermediate situations, such as for example, Truncatella. Some gastropods with gills live on land, and others with a lung live in the water

  3. Examples of land animals

  4. Aquatic animals • An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life.Some examples of invertebrates are coelenterates. • This phylum consists of jellyfish, anemones, corals, and hydras. Another type of invertebrate aquatic animal is the annelids which are segmented worms. • There are three different classes they are polychaetes, oligochaetes, and hirudinea.It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin.

  5. Examples of aquatic animals

  6. Flying/gliding animals • A number of animals have evolved aerial locomotion, either by powered flight or by gliding. • Flying and gliding animals have evolved separately many times, without any single ancestor. • Flight has evolved at least four times, in the insects, pterosaurs, birds, and bats. Gliding has evolved on many more occasions. • Usually the development is to aid canopy animals in getting from tree to tree, although there are other possibilities. Gliding, in particular, has evolved among rainforest animals, especially in the rainforests in Asia (most especially Borneo) where the trees are tall and widely spaced.

  7. Examples of flying animals

  8. Question and answer • What is your favorite animal/s? • What are the animals that you hate? Why?

  9. End of slide show Bleh!!

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