Which animal class has the most species?
crustaceans
arachnids
insects
birds
About 60% of all known species are insects.
reach: rather globalanimalsnaturezoology
Answers by country
crustaceans
arachnids
insects
birds
answers

17

16

30

222

10

10

132

13620

245

13

474

31

50

28

14

32

16

21

10

12