UNUSUAL AND UNIQUE

Those who have seen me I'm considered a freak
Something you don't see every day of the week 
I like to think of myself as unusual and unique
Come along to see me for a possible peek 

My habitat is with other animals at London Zoo
Don't come out much like those other animals do
Conditions have to be right if I choose to see you
Weather has to be hot and the sky must be blue

I'm well looked after by the lovely zoo keeper 
Other animals consider me a very deep sleeper
Don't make a mess so no need for a sweeper 
Not very hungry much so my food is cheaper 

So what makes me different from all the rest 
I'd rather not say consider it an intelligence test
Please keep it quiet for those who have guessed 
These are my wishes that need to be expressed