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Only monsters that live on land or those in the water, too ? Lakes, rivers, for example ?

That's a good idea. An adventure through the Glades of the Dead.

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Poisonous frog : "Oops, you stepped upon the most poisonous frog in the world ! By the way, it's one of the tiniest and most well-hidden froggs as well ..."

Ooh... That gives me an idea for swarms or monsters (like bugs).

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Were-Turkey : "Bitten by a Were-wolf, this turkey as rescued by an unsuspecting hunter. The hunter, however, was quite asonished as he had instead a wolf in his cage the next morning ..." [Based on a member of a different board who actually named himself "wereturkey" !)

I like that! I never thought of it going that way. Have you heard of the werehuman?