Cool game! pretty hard and didnt really know what Iwas looking for but once I saw the other frog I found it. The mechanics work really well together and its a fun concept. For the herons it would be cool if there was some sort of indicator of where they are just so I could plan my next move.
I saw that they move based on where I made a sound last time maybe add some ripple in the water so its clear what spot they are attracted to.
Other than that very fun and good take on the concept!