Barely any tree hollows are good enough for superb parrot nests, and that could pose an existential threat

One of Australia’s most vulnerable bird species is under growing threat from development, partly because it’s extremely picky about where it raises its young.

New research indicates superb parrots are so fussy about the tree hollows they chose to lay eggs in that they are limited to about one in 200 available nesting sites — far fewer than previous studies suggested.

And that could spell trouble for the endearing parrot, as its…