Haven't found the Dino instructions in most useful topics, but so many questions.

   Is the concept of the Dino quest also that you have to move from stage to stage, so when you fulfill the requirements for the first stage, you unlock the next one? Sort of like e.g. fairytales?

   What if you spot a dinosaurus of the "unclocked" stage and it builds 1/5 of the nest?

   Is there a Dino "support group" somewhere - as not many people are attracting dinosaurus, and it seems a really difficult task just to attract five to build the nest? ty

You unlock the next step of dinosaur after attracting 5 of the previous, but I found it easier to do all 40 of each dinosaur before moving on and just concentrating on one dinosaur at a time because of the different set ups needed to attract the wildlife to drop the eggs.

You can build nests for any dinosaurs, even those you haven't unlocked to attract.

Don't know of any support groups but once you start hunting you'll soon come across the same people who are doing the same as you.

You only actually need to hunt for the dinosaurs to build/repair your nests which is actually easier than trying to spot your weekly wildlife sometimes.  You can get the eggs dropped by the wildlife you attract too so sometimes it's easier to spot your own wildlife to get the eggs.

Ty for the info ... just two more questions:
    Do I understand correctly, that getting an egg is the same as building a sunflower - so either you spot or attract the required critter?
    Can you send the newly built nests to your storage? If for example by accident you get the "wrong" dino as the first dino in your future nest?
    Are the nests like easter nests - which can be used five times, and then you have to "rebuild it", by just ONE additional required critter -- or do you have to start east nest anew?
Thank you in advance for your helpful info

Hehe, actually three more questions - there are so many ;)

    Do I understand correctly, that getting an egg is the same as building a sunflower - so either you spot or attract the required critter? YES

    Can you send the newly built nests to your storage? If for example by accident you get the "wrong" dino as the first dino in your future nest? YES, DIFFERENT DINOSAURS THOUGH CAN'T ADD TO THE SAME NEST, SO HAVE OUT A FEW ROCKS SO IF YOU ARE HUNTING DIFFERENT DINOS, THEY DON'T GO WASTED AND WILL ADD TO THEIR OWN NEST.

    Are the nests like easter nests - which can be used five times, and then you have to "rebuild it", by just ONE additional required critter -- or do you have to start east nest anew? YES

I find the Wildlife dino lists quite helpful - sometimes people have had eg a Diplo spotted after posting in the Diplo list, but they might have a Steg Egg as well - it is worth checking a few different gardens to find the ones you're looking for for the nest.

I'm doing a variety of dinos depending on which wildlife are due to lay the eggs each week.

Hi, I’m also doing Dinos right now.  Can I also add that you can store a partially completed egg in storage too. Like Amanda, I have also found it easier, the majority of the time, to attract 40 of each Dino before moving onto the next. 

Enjoy

This list might be useful as for some critters, you need to plan ahead:

DIPLODOCUS
Raccoon, Gecko, Water Dragon, Field Mouse, Mallard, Grey Squirrel

STEGOSAURUS
Fox, Hare, Camel, Brown Bunny, Coyote, Donkey, Giraffe, Skunk, Kangaroo, Rainbow Dragon

VELOCIRAPTOR
Ostrich, Chipmunk, Deer, Golden Dragon, Bandicoot, Hippopotamus, Oriole, Wallaby, Guinea Pig, Prairie Dog, Meerkat, Armadillo

TRICERATOPS
Walrus, Platypus, Otter, Sea Lion, Griffin, Kingfisher, Seal, King Penguin, Puffin

SPINOSAURUS
Ferret, Tiger, Zebra, Phoenix, Red Squirrel, Pink Fairy Armadillo, Zebra, Llama, Koala

PTERODACTYL
Kiwi, Roadrunner, Australian King Parrot, Crane, Woodpecker, Blue Jay, Pegasus

MOSASAURUS (Underwater)
Sea Lion, Watery Seadragon, Seal, Sea Unicorn, King Penguin, Rainbow Seadragon, Puffin, Sea Pegasus, Walrus, Golden Seadragon, Platypus, Phoenish, otter, Griffish

T-REX
Red Panda, Olinguito, Nightingale, Gorilla, Jackdaw, Unicorn, Wombat, Giant Panda, Badger

This list might be useful as for some critters, you need to plan ahead:
 
  DIPLODOCUS
  Raccoon, Gecko, Water Dragon, Field Mouse, Mallard, Grey Squirrel

*** OH, SO YOU MEAN - THAT THE CRITTER FOR A CERTAIN DINO DOES CHANGE EVERY WEEK, BUT IT WILL CHANGE ONLY INBETWEEN THE CRITTERS THAT ARE ON THE LIST FOR A PARTICULAR DINO?

*** Also important -- ARE DINO TWINS (OR TRIPLETS) POSSIBLE? like with the butterflies or babies for example?

Andrea, ty for the lists!