I WONDER - What Did The Quetzalcoatlus Look Like?

Quetzalcoatlis, a prehistoric bird, migrated across North America for mating and nesting, similar to modern tropical birds. They nested in large groups on open ground, using mud and vegetation for nests. Hatchlings could fly within a year but took several seasons to reach full size.

In what type of environment did Quetzalcoatlis lay their eggs?

What factors contributed to the peak size and wingspan of adult Quetzalcoatlis?