You sold them!! That's too bad, they are super rares and earn a bit more money than the more common ones. You could have kept them until you needed extra room or something, but don't worry.
Here's a tip: go visit your market and see all the dragons availability. It will tell you (tap INFO) which ones are common, rare or super rare.
BUT NEVER GO TO THE MARKET WHEN YOUR NEST IS EMPTY - you may accidentally spend gold to purchase a dragon!!
Are you on and Android phone or on an Apple (iOS) device?
And yes, you're very lucky! Or you have been so far. It's quite fatastic really xD
Basically keep as many as you can, in as MANY HABITATS as you can (beware of the habitat limit) and sell COMMON dragons to make room for rarer ones. Aside from being cooler to own more rares/super rares, they should earn more coins than commons. And you need the cash.
Technically you'd only need one of each dragon, but hey. Keeping more of the less common ones is pretty cool.
Try spreading them out so that the ones that earn more (like scorpion, honeybee) are placed in a habitat with others that earn less. That way you can balance your income. Meaning, each habitat ought to be earning the same ammount of silver as the other habitats, so that one of them won't be full of money while the other is not.
Lol trying for eagle and getting scorpions and honeybees... So cool.
scorpion and honeybee are super rares. Eagle is rare, firestorm is the common one.
Don't forget to download the egg chart
here.