Nature Quiz - Rivers - Invertebrates (Questions)

The term invertebrate refers to an informal collection of a very large number of animals. Inverterbrate means without a backbone. Amongst invertebrates are sponges, flatworms, molluscs, arthropods, insects and various worms. It is estimated that 97% of all species alive today are invertebrates. Insects are by far the most numerous. There are so many species of insects that scientists have yet to discover them all, let alone name or count them. Estimates of the total number of insect fall in the range of 1 to 30 million!

In this quiz, we have chosen 10 invertebrates that live in or around freshwater rivers, streams, lakes and ponds. If you wish to get a closer look at the creatures, just click on the photo to enlarge it.

To see a larger image, click on the picture.
1. This freshwater snail is popular for aquariums in the United States. What is it called?
[ ] Mystery snail
[ ] Ramshorn snail
[ ] Apple snail
[ ] River snail
2. Crayfish is a popular dish in Sweden and Finland. It is flavoured with large quantities of which plant?
[ ] Basil
[ ] Thyme
[ ] Rosemary
[ ] Dill
3. Can you identify this invertebrate?
[ ] Water flea
[ ] Water mite
[ ] Water nit
[ ] Water midge
4. Can you identify this invertebrate?
[ ] Alderfly
[ ] Caddisfly
[ ] Mayfly
[ ] Snakefly
5. Can you identify this invertebrate?
[ ] Scorpionfly
[ ] Springtail
[ ] Hoverfly
[ ] Stonefly
6. Can you identify this invertebrate?
[ ] Cranefly
[ ] Snakefly
[ ] Kedfly
[ ] Sawfly
7. Can you identify this invertebrate?
[ ] Acorn worm
[ ] Bootlace worm
[ ] Horsehair worm
[ ] Flatworm
8. Leeches are hermaphrodites. What does this mean?
[ ] They do not sleep
[ ] They eat their young
[ ] They have both male and female reproductive organs
[ ] They have no reproductive organs
9. Can you identify this invertebrate?
[ ] Alderfly
[ ] Dobsonfly
[ ] Fishfly
[ ] Caddisfly
10. Can you identify this invertebrate?
[ ] Lacewing
[ ] Stonefly
[ ] Mayfly
[ ] Mosquito
Nature Quiz - Rivers - Invertebrates (Answers)
1. This freshwater snail is popular for aquariums in the United States. What is it called?
[ ] Mystery snail
[x] Ramshorn snail
[ ] Apple snail
[ ] River snail
2. Crayfish is a popular dish in Sweden and Finland. It is flavoured with large quantities of which plant?
[ ] Basil
[ ] Thyme
[ ] Rosemary
[x] Dill
Both the stems and the flowers of dill are used, along with salt, sugar and ale
3. Can you identify this invertebrate?
[x] Water flea
[ ] Water mite
[ ] Water nit
[ ] Water midge
4. Can you identify this invertebrate?
[ ] Alderfly
[x] Caddisfly
[ ] Mayfly
[ ] Snakefly
5. Can you identify this invertebrate?
[ ] Scorpionfly
[ ] Springtail
[x] Hoverfly
[ ] Stonefly
6. Can you identify this invertebrate?
[x] Cranefly
[ ] Snakefly
[ ] Kedfly
[ ] Sawfly
7. Can you identify this invertebrate?
[ ] Acorn worm
[ ] Bootlace worm
[ ] Horsehair worm
[x] Flatworm
8. Leeches are hermaphrodites. What does this mean?
[ ] They do not sleep
[ ] They eat their young
[x] They have both male and female reproductive organs
[ ] They have no reproductive organs
9. Can you identify this invertebrate?
[x] Alderfly
[ ] Dobsonfly
[ ] Fishfly
[ ] Caddisfly
10. Can you identify this invertebrate?
[ ] Lacewing
[x] Stonefly
[ ] Mayfly
[ ] Mosquito