As a biology student, i would suggest ex situ conservation approach for such animals.
It involves placing the threatened animals and plants in special care units for their protection. It .includes offsite collections (Botanical Gardens, Zoological Parks, etc) and gene banks (seedbank, tissue culture, etc).
Advantages of ex situ conservation are:
(i) Offsite collection can be used to restock depleted population, reintroduce species in the wild and restore degraded habitats.
(ii) It is useful in maintaining a large number of genotypes in small area, rapid multiplication of even endangered species, through tissue culture, etc.