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1. Orang-utans are gentle and sit for hours gazing.

2. Orang-utans are highly intelligent and will poke twigs into holes to catch insects, chew up leaves and use them as sponges and use branches and sticks to test the depth of water before entering it

3. Orang-utans have opposable thumbs which means they can touch each of their fingers with their thumb

4. Orang-utans have 32 permanent teeth (the same amount as humans). They have sharp canine teeth with the male Orang-utan having longer canine teeth that they use for threat displays and fighting

5. Mosquitoes bother Orang-utans just like they do humans and they will use branches like fly swatters to swish them away

6. Most Orang-utans build a nest every night high up in a tree and sometimes even add a roof of leaves

7. Orang-utans can make approximately 13 to 15 different vocalizations

8. The name “Oran-gutan” translates into English as “man of the forest”. It comes from Malay and Bahasa Indonesian orang (man) and hutan (forest)

9. When on the ground, Orang-utans walk on all fours, using their palms or fists

10. When males are fighting, they charge each other, grapple, and bite each other’s heads and cheekpads. They sometimes look like Sumo wrestlers

1. The name hippopotamus means ‘river horse’

2. Hippos typically live for around 45 years

3. Hippos can’t swim, even though they spend most of their time in water!

4. Although hippos might look a little chubby, they can easily outrun a human

5. Hippos have powerful jaws and sharp teeth that can crush a crocodile or split a boat in two

6. Hippo’s milk is bright pink

7. Hippos can’t jump

8. Hippos can weigh up to 3 ½ tonnes!

9. Hippos can’t sweat so they spend lots of time in the water to keep cool

10. Hippos can hold their breath for 6 minutes