the frog prince
“Their tadpoles cannot survive without the care of both their father and mother, as there is too little natural food in their smaller pools.
So the adult frogs stick together.
Overall, the researchers believe they have found convincing evidence of an evolutionary chain of causation: changing the breeding pool size forced the mimic poison frog to change its system of parental care, with males and females working together. That then culminated in social and genetic monogamy.”
(i love this report.)