Trill code Male orange-eyed tree frogs trill to advertise their size not to prospective mates, but to other males, a new study has found. "Frog calls are analogous to a human face in terms of the ...

Seven species of frogs and one toad make the Northland their home. Each lays its eggs in water. Some stay in the water, others go off to live on land for the rest of the year. All give calls and songs ...