Our Animals
Our Animals

Our Animals

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Ended

Overview

Our Animals looks at Australian animals, their physical features, food, homes and environment and social groups. An ABC Schools TV series for lower to middle primary school students

English
E16

Blue-tongued lizards

Blue-tongued lizards are reptiles. There are 6 different kinds of blue-tongued lizards in Australia. Here are 4 of them. Eastern Blue-tongue. It can grow as long as your ruler. Pygmy Blue-tongue. It's only about 10cm long. Blotched Blue-tongue. Like most Blue-tongues it has a pointy tail. Bob-tailed Blue tongue. It has a short stumpy tail. It's also called the Shingleback, the Sleepy Lizard, the Boggi, and the Stumpy-tailed lizard. They are called Blue-tongued Lizards because they have fat blue tongues. Like most lizards, blue-tongues can smell through their nostrils and their tongue. They eat snails, slugs, flowers and fruit. They don't chew their food. They hold and crush it. They have dry scaly skin. Blue-tongues are slow and gentle. They won't bite unless they are attacked or when they are frightened when picked up. The bite might hurt but it is not poisonous. It's best to leave them alone. They won't hurt you. Most Bob-tailed blue-tongues have the same partner all their lives. Baby blue-tongues come out from a hole under the mother's tail. From the moment they are born they have to find their own food. If they are really lucky they can live for 30 years. Dangers to Blue-tongued lizards include: Cars Blue-tongues often lie on the warm road surface and don't move out of the way of cars. Snail baits If blue-tongues eat snails and slugs poisoned by snail baits they will die. Lawn mowers Blue-tongues often hide in long grass and don't run away when lawn mowers come near them. Cats and dogs can kill or injure young blue tongues and big dogs can kill adult lizards. Eagles, poisonous snakes and large goannas sometimes eat blue-tongues.

TBA 5m
E18

Frogs

They are amphibians. That means they spend part of their life as a water animal and part as a land animal. Their skin is very sensitive. They die in polluted water. Frogs are carnivores. That means they eat other animals. They have teeth inside their huge mouths, but the teeth aren't used for chewing, just for holding because frogs swallow their food whole. Frogs use their eyes to help them swallow. They pull their eyeballs into the mouth to push food down into their tummies. Their bulging eyes also help them see in almost any direction. Their strong back legs are good for jumping and for swimming. They have to come to the surface to breathe, otherwise they drown. Male frogs are smaller than female frogs but they are a lot noisier. Different sorts of frogs make different calls. This is a spotted tree frog. This is a green tree frog. Most frogs mate in water. As the female releases her eggs the male releases his sperm to fertilise the eggs. The eggs are protected by a jellylike substance. This mass of eggs and jelly is called frog spawn. After mating the parents have nothing more to do with each other or their future babies If the eggs don't get eaten by birds, fish or insects or the water doesn't become polluted or dry up, tiny tadpoles will hatch from the eggs. Tadpoles have long tails. Tadpoles eat only plants so they are called herbivores. As they eat they get bigger and bigger. Like fish they have gills so tadpoles can only breathe underwater. Tadpoles get their back legs first. Then their gills disappear and lungs develop inside the body. Their front legs develop where the gills were. The little frog now has to have its head out of water to breathe. The tail gradually disappears. It's now a tiny adult frog.

TBA 5m
E20

Crocodiles

They are reptiles so they have scaly skin. Their backs have notchy scales with blocks of bone inside. This is like protective armour. Their sharp teeth aren't used for chewing, just for holding onto food. Food is generally swallowed whole or in large chunks Crocodiles are lucky. If they lose teeth they just regrow. The strong tail can be used as a weapon to deliver a powerful blow. The tail can also be used to push a crocodile straight up out of the water to grab some poor bird sitting on a low branch. The tail also makes it a good swimmer. The swimming motion is like a wave from head to tail. Crocodiles can live on the land and in the water. In the water most of the body is hidden. You can only see the nostrils and the eyes above the water. That way the crocodile can breathe and see any delicious meal that might come near the water's edge. With so little showing above the water it's hard to tell how big it is. Crocodiles eat almost anything, but they prefer meat. Fruit and vegetables aren't their favourite food. Like most reptiles, crocodiles lay eggs. The female lays them in the sand or under rotting leaves. She covers them to protect them from hungry snakes, birds, goannas or even other crocodiles. These animals like to eat crocodile eggs. When they are ready to hatch the baby crocodiles make a yapping sound from inside the eggs. This lets mum know her babies are ready to hatch so she digs them up and if they are having trouble getting out of their shells, she helps them by rolling the eggs inside her mouth and gently squeezing them until they hatch. Mum may also carry her babies to water. The baby crocodiles have to find insects to eat. Mum protects them for a month or two, but then they are completely on their own.

TBA 5m
E24

Sharks

Sharks are fish. There are over 300 different kinds of sharks. White tipped shark. Wobbegong shark. Port Jackson shark. Grey nurse. Leopard shark. Some can be dangerous to humans, but most are not. The slits on the side of a shark's head are its gill slits. They need them to breathe. Most fish have scales. It's hard to see shark scales as they look like very tiny teeth. So their skin feels rough — a bit like sandpaper. (In the olden days they used shark skin as sandpaper! It was called shagreen.) The holes just above the mouth are nostrils Sharks can smell very well. They also have excellent hearing and can feel small vibrations in the water. They can even find animals buried in the sand. Sharks have several rows of teeth. When the front teeth wear out they are replaced by new ones. Different sorts of sharks have different kinds of teeth. This is a grey nurse shark. It looks fierce and it can be, but it's not interested in humans unless we annoy it. It's teeth are used to grab fish or squid. The food is then swallowed whole. This Port Jackson shark has tiny teeth to grab and crush crabs and sea snails. Male sharks have claspers. They are 2 lumps underneath it's body. Female sharks don't have claspers. Some sharks lay eggs, others have live babies. Grey nurse sharks have live babies. Shark babies are called pups. Grey nurse sharks usually have only one or two pups. When they are born they are quite big. They can immediately see, hear, smell and swim just like mum. Mum doesn't look after her pups. They are on their own and have to find fish to eat. If they are lucky grey nurse sharks can live for about 20 years.

TBA 5m

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