You have the right idea. Find a way to get picked up by that bird using the nearby creatures.

After hours I finally figured it out. If anybody needs help with it, just ask :)

I wouldn't mind a couple hints

seems you can stump upside to wake up a downside bubblefrog
you may need to bubble a bug down the water
seems the position the bubblefrog stayed already can't send the bug to so far

Alright. I'm down to my last 4 collectables. The strugglleeesss :(

The first ones are up here:
http://i.imgur.com/7ltXMSBh.jpg
http://i.imgur.com/uYBfggTh.jpg

And I can only assume the others are to the right here:
http://i.imgur.com/shg6lN1h.jpg
http://i.imgur.com/sD4wsNoh.jpg

I managed to get a frog up the ledge on the right and bubbled my way into a teleport, but the bubble bursts just a couple of frames on the other side of the bubble, sending me back into the portal. I was able to see a bird at the other side.

At this point I'd take hints or a step by step walkthrough. I can't stand that I can't solve these puzzles :(

Also, is the lavaaaaargh achievement a secret achievement? As it didn't unlock with me falling into lava, nor is it a "kill x creatures with lava" achievement.

Originally posted by Rik NL:

is the lavaaaaargh achievement a secret achievement? As it didn't unlock with me falling into lava, nor is it a "kill x creatures with lava" achievement.

I think it's either a "die this many times in lava" or "die in particular lava patch" achievement.

Originally posted by ckcheeseboy:

I wouldn't mind a couple hints

bubbling yourself to the bird requires getting the frog and the berrybug far out into the water so the bubble escapes that overhang. The frog can get out on its own. How far out can you get the berrybug...?

Anybody who can help me? I'm kinda stuck at those last collectables for a about an hour or 2.

Alright. I'm down to my last three (!!) collectables. Please help me. I am desperate.

Originally posted by Rik NL:

The first ones are up here:
http://i.imgur.com/7ltXMSBh.jpg
http://i.imgur.com/uYBfggTh.jpg

Those were the last ones I found.
The puzzle looks like you have to bubble up there from the right. This is incorrect.
Enbubbled bird goes in (to a warp), enbubbled bird goes out (of a warp). You can't explain that.
Get the frog and a bug on the left side of the bottom warp.

Originally posted by Rik NL:

And I can only assume the others are to the right here:
http://i.imgur.com/shg6lN1h.jpg
http://i.imgur.com/sD4wsNoh.jpg

If that's the puzzle I think it is, to the left, there's a bunch of frogs with a bunch of bug spawners over them.
Why do you think they gave you so many frogs?
Try making your way over the top of those spawners.
Once you've done that, though, you'll find that there are still some out of reach. How do we climb over walls that are too tall for us to walk up?
Get an inflated frog on top of the spawners

Originally posted by ParseThePotatoes:

Originally posted by Rik NL:

The first ones are up here:
http://i.imgur.com/7ltXMSBh.jpg
http://i.imgur.com/uYBfggTh.jpg

Those were the last ones I found.
The puzzle looks like you have to bubble up there from the right. This is incorrect.
Enbubbled bird goes in (to a warp), enbubbled bird goes out (of a warp). You can't explain that.
Get the frog and a bug on the left side of the bottom warp.

Originally posted by Rik NL:

And I can only assume the others are to the right here:
http://i.imgur.com/shg6lN1h.jpg
http://i.imgur.com/sD4wsNoh.jpg

If that's the puzzle I think it is, to the left, there's a bunch of frogs with a bunch of bug spawners over them.
Why do you think they gave you so many frogs?
Try making your way over the top of those spawners.
Once you've done that, though, you'll find that there are still some out of reach. How do we climb over walls that are too tall for us to walk up?
Get an inflated frog on top of the spawners

I've done the first puzzle a couple of hours ago, but still stuck on the last one.

As far as your spoilers go, I tried to do that, but that's the problem, I can't get the inflated frog up there. I'm struggling with the frog puzzle... I tried lots of things, I either get the frog up there, but I can't get up myself, or vica versa.

Alright got them all. Now i just need to find the dark room and the rose with -that- song.

Any help on which area I should look in?

Originally posted by Rik NL:

Alright got them all. Now i just need to find the dark room and the rose with -that- song.

Any help on which area I should look in?

I'm in the same boat but I'm also missing the obstacle course, and I can't seem to figure out how to kill the giant birds on the tiny frog level.

There might already be threads for these, but here are some hints and serious spoilers:
Since these are the last things to find in the game, a spoiler-free hint is to just take the collectibles reward and try to explore everywhere with it.

Rose
You need to be able to fly to do this
Look around the area in the North-East, before where the sniper-frog was found

Dark Room
Fly around the disco

Obstacle Course
You need to be able to fly to do this
Look around the volcano base area, past where the collectibles reward door was

The giant birds on the tiny frog level can be smashed in that tiki-door thing that closes when Toki-Tori is two segments away from it. They just take careful timing to smash in it.

Here is my method:
Lead them to the door with whistles. They should NOT spot you yet.
Get under the door, then let one spot you. As soon as it does, run away. There is a sweet-spot in how long to wait before starting to flee.
The bird should break off its chase somewhere under the door as you leave the door's range, and you should be far enough away that the door then closes.
It is much easier to lead the top bird back down to the door with the flying wings