Neognathae is a clade of modern birds that includes most living species. They are characterized by their advanced jaw structure, which allows for a greater variety of feeding habits compared to their ancestors. This group encompasses a wide range of birds, from songbirds to raptors, and is distinguished from Palaeognathae, which includes flightless birds like ostriches and kiwis. Neognathae birds typically have a more flexible palate and a unique arrangement of bones in their skulls. This adaptation supports diverse lifestyles and habitats, enabling them to thrive in various environments around the world. Their evolutionary success is reflected in their vast number of species and ecological roles.