Habitat quality is highly variable and as a result smaller species tend to be present in less of their range.

This species tends to do best in large lakes and rivers.

Identifying them is a problem for a start - many species tend to look just like several others!

Unspecialized species also tend to be small in body size.

Indigenous species usually tend to be better adapted to the local environment.

The species also tend to roost in small groups or as individuals.

Their natural lifespan is between two and five years; the larger species tend to live longer than the smaller.

It contends that species with larger body sizes tend to have lower rates of population growth.

But the different species tend to be very "host specific" meaning they will only eat one type of plant.

The species tend to cross, which will result in many garden surprises.