Based on how this egg looks, it seems that the creature inside might have the ability to both fly and paddle in the water... what on earth could be growing inside?
When they first hatch, Hyadens spend a lot of time in the water and on the ground. Their webbed feet allows them to paddle and swim quickly, evading predators. Eventually, their wings come in and things start off... let's just say... very awkward at first. When it comes to flying, a Hyaden can look ridiculous when they first start. After being land-based since the beginning of their lives, it's difficult to get the wings to connect with levitating off the ground and going somewhere.
Hyadens cannot learn how to fly naturally (it is not innate) by stepping off a high place after their wings are developed. It takes training and time.