bears
koala
shark
anaconda
Bison
moose geese mouse horse
There are several animals whose names are five letters long and end in an "e". Some of them are listed here.AnodeCraneEagleFlukeGeeseGooseGrebeHorseLouseMooseMousePeweeSableSkateWhale
Whale,
The only word I can think of that fits those requirements is solla, which is a fish. (Plaice in English)
There are several trees that all start with the letter 'p' and are five letters long. The name of one tree that starts with the letter 'p' and is five letters long is the peach tree.
duck
adder
Roast
perversely
There are no countries (in English) with names five letters long with "s" as the second letter.