So, let me get this started, the amount of trees in niche is pretty good so far, but the one thing I have a small gripe with is the lack of effect rivers have on the surrounding biomes, maybe this could help further immerse us in the game as well as add interesting game mechanics.
The weeping willow tree, for the most part, functions like your standard tree(except it spawns only near rivers) in niche, being a place where winged nichelings can perch, but has no nuts like the mangrove tree, this is where the special part comes in.
The weeping willow tree, after 10 days of being discovered, will be infested with 7 willow leafminers(caterpillars) which will eat the leaves.
After about 3 days on the willow tree, if the caterpillars are not collected at least once(which give a delicious 3 food each), the tree will die, leaving behind a bare, dead tree(can still be perched on, but won't be of much use other than calling) that won't have anymore of them. If even 1 of them survives the 3 days without being picked off, that moth will turn into a moth cocoon(s)(also the pic cannot found), which are mostly aesthetic, but after 2 days, they will turn into a moth eclipse. The individual moths look something like this:
these moths will fly around the map randomly(3 flight), until they find another willow tree to lay eggs on. Also once 10 days has passed of the adult moths existing, they die. They also make berry bushes and other plants regrow their respective resource faster.(times 2 effectiveness, doesn't work in rain)
You can collect the moths themselves for 5 food each, making them easy prey for nichelings that can catch up with them, however they will flee from a nicheling that's not in grass/has camo.