Yeah, bringing back the dodo would be pretty cool. Mammoths, too.
I remember reading early settlers’ accounts of passenger pigeon migrations. They said the sky was darkened by them for a couple of days as the huge numbers of them flew overhead. It must have been quite the sight, and I was sad they had gone extinct. The settlers had a few things to say about their droppings, too, but I’ll leave it at that.
The Extinctions
Passenger Pigeons: Stewards of the Hardwood Forests
https://www.theextinctions.com/articles-1/passenger-pigeons-stewards-of-the-hardwood-forests