That they can, the majority though are known though for other types and can learn more of them then normal, or use them. Such as mixes like a water/physic type like Starmie or Fire/Flying like Charizard. They start off with normal moves but as they grow, when Charmander becomes Charizard it inherits more fire types moves along with flying. Plus its wings maks it ideal for it. While other birds like the Pidgey evolutons and Spearow are known primarily for flying. However, they also gain normal attacks along the way such as quick attack, whirlwind etc. And mostly the others is flying. And if you look at what you can teach those bird types HM wise, it is overwhelmed by normal attacks.