Members of the class, Insecta have:
two pairs of wings,
three pairs of jointed legs,
tri-segmented bodies: head, thorax, and abdomen,
hard exoskeletons,
a pair of compound eyes,
a pair of antennae,
bilateral symmetry.
Additional Information:
The first three characteristics listed, might be considered distinguishing. While insects display all these characteristics, not all are distinguishing. Humans, for instance have bilateral symmetry and a pair of eyes.
There are other, more subtle characteristics. Also, there are some apparent exceptions that can be observed at certain stages of development. The process of metamorphosis that insects undergo in their development to adulthood, explain these.
Insects belong to the Phylum: Arthropoda, Subphylum: Mandibulata, and Class: Insecta. They are the most diverse class of animals and the most numerous, by individual and by species. More than a million species have been described. Estimates range from 5 to 9 million, of species that have yet to be discovered and described.
No, they are non-vertebrate animals, belonging to class insecta.
Fish are the largest group or class of vertebrate
Wasps belong to the insect class Insecta and the order Hymenoptera.
A lepidopterist studies animals from the Class Insecta, Order Lepidoptera (butterflies and moths.)
Insecta class
class insecta
Insects belong to the class Insecta in the phylum Arthropoda.
insecta
Insecta
Insecta
Insecta
Arthropods - Hexapoda (six-legged animals) - Insecta - Hymenoptera (membrane-wings) - Apocrita (wasps, bees and ants). Though technically their class is Insecta, I went a bit too far. ;)