Coyobird

Coyobird is a future descendants of seriema birds of South America that filled the niche of the now-extinct coyotes, hence their names. Unlike their ancestors, they are now completely flightless and now usually inhabit more arid parts of North America, where coyotes once inhabit. They are mostly nocturnal animals, unlike their ancestors.

Evolution
After the Late Holocene ended, humans are now gone, but it was already too late for some carnivores of North America like coyotes. Foxes are still around, but they haven't changed much, so to fill the coyote's niche, seriema birds from South America had spread into North America, where they spent more time on the ground due to less predators around. They eventually lost powered flight as they grew larger and stronger, about the size of the extinct coyotes. Their bills became stronger for killing prey about as large as a now-extinct domestic sheep. They became more active in nighttime, not just daytime. Seriemas had evolved into coyobirds.