OK, I have a simpler request. Has anyone discovered places on the map where collectibles appear, but are obscured by things like trees, etc.? I've looked for signs, such as sparkles, etc. but no luck. If anyone knows these spots, I would LOVE a screen shot.....
I don't think there are such areas. I've seen feathers laying on top of walls, etc. I think it's totally random, beyond that it has to be a place children can walk. Of course, the turtle shells only show up around the love shack, the coral around the sea, and the tablet only around the southern cave, but the feathers are the only ones that are blocked by the trees, so I presume you're asking about those; and those are dropped pretty much anywhere a villager can walk, as far as I can tell.