Or is it yet another example of social decay, that parents can’t even discipline/raise their kids well enough to allow them outside without leashes?

From what I’ve heard, the expectations of behavior for children in public spaces has gotten a lot more strict. People generally have very little patience for your kid’s antics. Also fewer mothers are dedicated homemakers, and when time and energy are tight, a leash might be a good bandaid.

Mario taking a nap basically anywhere in Mario64 is cute.

Packed very tightly. I believe the mother can’t eat for the last few days of carrying the egg.

They also have one of the largest egg size to mother size ratios of any species of bird.