amnionic eggs
Land animals which have tough and dry skin are called reptiles:)
The term "leatherly" generally describes something that has the characteristics or qualities of leather, such as texture, appearance, or smell. It can refer to items made from leather or evoke a sense of sturdiness and durability associated with leather products. Additionally, it may be used metaphorically to describe a tough or resilient nature in people or situations.
amnionic eggs
A reptile egg is much much much softer than birds egg.
Birds don't have fins as fins are for swimming in water. One could argue that they have scales on their feet as the skin there is tough and 'scaly' but there is not an overlapping matrix of scales like their would be in reptiles.
Most reptile eggs are leathery to protect them when laid in holes where they drop into contact with other eggs and it serves to make them more resiliant when covring the eggs with sand, dirt and other debris to conceal them.
Reptiles are cold blooded (cannot regulate body temperature) animals. Reptiles are vertebrates (with a backbone). Their bodies are covered with scales or scutes. They lay eggs. Reptiles skin is tough, rough and scaly.
Animals do eat reptiles. Particular animals do eat a vast variety of reptiles. Reptiles can even eat other reptiles. Mostly, it's not a common snack for animals in general because reptiles are scaley and tough to chew and defend themselves well.
They allowed them to move away from water.
Sick or elderly birds may, but healthy birds can survive tough winters.
Reptiles have a tough, scaly skin made of keratin, which helps prevent water loss and provides protection from environmental hazards. Their skin is often dry, as opposed to the moist skin found in amphibians, and it can come in various textures and colors, helping with camouflage or thermoregulation. Reptiles periodically shed their skin in a process called ecdysis, allowing for growth and the removal of parasites.
Definetly the Dragons! The Birds are tough but the dragons have a higher hitting average.