Okay, I need a small hint. I've managed to figure out every puzzle/collectable except for this one.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=163168574

This is in the level with those two frogs that fall in parallel through two portals over and over again. The collectibles are somewhere far up, and I assume that I need to get this bird to pick me up somehow. But I can't for the life of me figure it out.

I still want to partially figure it out on my own, so maybe a small hint. Or at least which side of the lake I should be approaching the problem from. :)