 
 <prompt> Aves na wetin? Based on di question wey dey before, write small tori wey get di answer. E fit be 1 - 20 sentences. Context: <response>: ```Di fossil record show say birds na di last dinosaurs wey survive, dem evolve from ancestors wey get feather inside di theropod group of saurischian dinosaurs. True birds first show face during di Cretaceous period, about 100 million years ago. DNA-based evidence show say birds diversify well well around di time wey di Cretaceous–Paleogene extinction event happun wey kill all oda dinosaurs. Birds for South America survive dis event and dem come migrate go oda parts of di world through multiple land bridges while dem dey diversify during times wey global cooling dey happun. Primitive bird-like dinosaurs wey no dey inside class Aves proper, inside di broader group Avialae, don dey found since di mid-Jurassic period. Many of dis early "stem-birds", like Archaeopteryx, never fit fly well well, and many still get primitive characteristics like teeth for jaw instead of beaks, and long bony tails.``` 