It is a really nice coin, about the size of the old large US silver dollars (38mm in diameter) and made with 31g of 0.925 pure silver (so about an ounce of pure silver). It is a proof coin and really shines. There is precious little information about this issue anywhere, but it would seem that the initial mintage was about 20,000, although that seems high given how few of these there seem to be around. Even numista.com, which seems to have about every coin ever made on it, does not have this one.
Looking at the bat's left wing you will see the correct anatomy of a bat's wing (more or less). Bats have five fingers, but the second finger runs pretty close to the first finger (skipping the thumb which is the little hook coming off the wrist) and there is only one point at the tip of the wing for both fingers. Now look at the bat's right wing. Oops, it has FOUR fingers all reaching the edge of the wing separately. So a pretty major goof for a coin produced specifically to focus attention on the bat.
The other elements of the obverse are pretty straightforward. The date at the top and the "Endangered Wildlife" slogan that is on all these WWF coins on the bottom. Mixed in is a banana plant, which is a source of food for these bats, and some islands with palm trees and a volcano. Very nice. Makes you want to visit.
So a super-collectible coin getting harder to find all the time, proof, and made from an ounce of silver. And in theory the initial purchase went to help fund wildlife conservation. A winner of a bat coin, even if they don't really quite know what a bat's wing looks like.