Comment on Why is land/sky so cleanly split between mammals/birds?
pwnicholson@lemmy.world 1 week ago
Lots of great answers already, but one interesting thing that seems to be like it would keep more mammals from evolving to fly:
extra weight of the young during gestation.
Egg-laying birds get to breed but don’t carry around that extra weight for nearly as long or as heavy. That’s got to be a huge evolutionary advantage, right?
LifeInMultipleChoice@lemmy.world 1 week ago
Ducks seem to go and nest to lay anyways. Stick around one spot for up to 15 days of shitting out eggs, then sit for another 30 days waiting for them all to hatch. Sit rotate eggs sit barely leave. Then teach to swim etc before they do the whole flying away part