Gastric Brooding Frog
The Gastric Brooding Frog’s name explains its big gimmick – mothers would swallow their eggs soon after fertilization and allow them to grow within their stomachs. Then, once the babies had grown all the way from tadpoles into adult frogs, she would vomit them out, one by one. Sadly, this incredible species went extinct some time in the 1970s due to a poisonous fungus that overtook its native habitat.