That number is Unkown
There are many ways in which you can classify an unknown species. To classify an unknown species you can compare it to similar species.
It they are unknown how would we know if they are unknown
the number of species endangered in Russia is unknown to us at this moment.
Many things in space are still left unknown.
Unknown. They discovered some new species only last month.
This is unknown. The population of Lumholtz's Tree kangaroo is not endangered, but is listed on the IUCN Red list of threatened Species as "least concern", with a population trend of 'stable', but figures are not available regarding how many are left.
There are 700000 prairie dogs in the worldthere are 700,000 prairie dogs left in the world in 2009100
It is impossible to quantify an unknown factor.
about 295
They're about 30,000 left. That is a lot. The population trend of the barracuda species is unknown, but neither is considered endangered.
how many wolverines are left? Why is wolverine considered to be an endangered species?
There are 156 species of chidlids but 69 of the species are endangered :D