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Overfishing is causing a sharp decline in the number of fish in our oceans.
Species Extinction
Discover what species extinction means and why it happens. Learn how habitats change, why numbers fall, and how people can protect wildlife before it is too late.
1 .
Extinction is nothing new. Earth is currently undergoing a "mass extinction". How many mass extinctions have there been before now?
Seven
Five
Three
One
2 .
The dodo became extinct in the 1600s but was not recognised as such until the 1800s. Why?
Because few people believed that dodos ever existed
Because there was a living dodo in London Zoo
Because extinction was thought to be impossible
Because there were thought to be dodos living on the moon
Few people believed in extinction until it was proven by scientist Georges Cuvier, 150 years after the dodo died out
3 .
Humans are causing the sixth mass extinction event, but what is the biggest threat to species?
Habitat loss
Overhunting and overfishing
Pollution
Climate change
There are many different threats to wildlife but, for the time being, habitat loss is the greatest. Climate change is expected to become the biggest threat unless action is taken soon
4 .
Which country has the greatest number of endangered species?
Germany
The UK
Russia
Mexico
Mexico is the country with most species under threat. Indonesia come second and Madagasca third
5 .
Invasive species pose a danger to wildlife. What is an invasive species?
A species that spreads disease
A species that is not native to a region
A species that hunts other species
A species that was created by humans
Invasive species cause problems for local wildlife, such as:
A lack of natural predators means their population can grow quickly
Native species might be unable to defend themselves against the newcomers
Native species may struggle to compete for resources
A lack of natural predators means their population can grow quickly
Native species might be unable to defend themselves against the newcomers
Native species may struggle to compete for resources
6 .
Many species are under threat due to poaching. What is poaching?
Overhunting and overfishing
Temperature increase
Illegal hunting
Egg stealing
Species such as elephants, tigers and rhinos (along with hundreds of others) are threatened by poaching
7 .
Loss of habitat is the greatest threat to wildlife. Which of the following is a cause of habitat loss?
Deforestation
The building of dams
Urban development
All of the above
Habitat destruction is caused by many human activities:
Mining for fossil fuels and minerals
Deforestation
River dredging
Urbanisation
Filling in swamps and wetlands
Building river dams
These are just a few. Even something as apparently innocent as mowing fields destroys natural habitats
Mining for fossil fuels and minerals
Deforestation
River dredging
Urbanisation
Filling in swamps and wetlands
Building river dams
These are just a few. Even something as apparently innocent as mowing fields destroys natural habitats
8 .
The number of fish in our oceans is shrinking. What is the main reason for this?
Alien abductions
Overfishing
Dumping rubbish into the sea
Oil spills
The number of fish in our oceans has shrunk dramatically. Some predict that by 2048 there will be so few fish left that they will be virtually extinct
9 .
Because of the damage we are causing to other species, scientists have given what title to humans?
Global superpredator
World killer
General destroyer
Universal monster
The reason we have earned this unwelcome moniker is that we kill apex predators (like sharks or tigers), as well as animals we eat. We also have a negative effect on food webs we should have no part in, due to pollution, habitat loss and the like. Humans do seem to be bad news for every other species we share the planet with
10 .
What can we do to help save species from extinction?
Recycle
Protect habitats
Use alternatives to pesticide
All of the above
These are just a few of the ways we can help. Others include growing native plants, reducing our water consumption, not buying plastics, reducing our carbon footprints, boycotting polluting industries, and lobbying our MPs
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444 million years ago, 86% of species were lost
375 million years ago, 75% of species were lost
251 million years ago, 96% of species were lost
200 million years ago, 80% of species were lost
And (most famously) 66 million years ago, 76% of species (including the dinosaurs) were lost
The current age is called the "Holocene extinction"