You don’t necessarily have to have ejector seats - WW2 era bombers for example relied on the crew making their way to a hatch to bail out. Despite being a considerably lower chance of survival than modern systems (not helped by various positions having to crawl through narrow spaces to escape and/or find and put on their parachutes due to not having space to wear them during normal operation) the option of bailing out saved a large amount of people.
Kangaroos are the clear winner in my experience, but we’ve also got possums and various parrots (e.g. sulphur crested cockatoos). Wombats too but they’re less common to see.