There are two species in the order odonata, dragonflies and damselflies.
Hedgehogs Moles Tenrecs Shrews Solenodons gymnuresThese all eat insects, hence the name.
Rodents
It depends on the species. If it's endangered, there could be only a few (single numbers maybe to 100's or 1000's). If it is a very successful species like humans, there are around 7 billion humans...
Impact of the Delta Smelt in California's Central Valley
Endangered Animal Species in Florida
How to Name Different Parasite Species
Importance of Endangered Animal Species Conservation