Possums have one of the shortest pregnancies at 16 days.
More Animals Facts
Elephants have the longest pregnancy in the animal kingdom at 22 months.
The nest that an osprey is a huge and attractive one which is unhidden from sight and the bird adds new material each year to the same old nest. The nest can weigh up to 450 kilograms.
The arctic tern, a migrating bird is able to travel back and forth as much as 22000 miles in a course of a year.