American mother Robins (species of bird) will eat the poop of their babies. The fecal sacs are full of partially digested food items for the mother to eat and it keeps the nest clean.Previous Fact Next Fact
Baby robins can't wear diapers of any kind, but they do put their poop in a strong "Bag" so the parents can carry it away. Fecal sacs are just like disposable diapers for birds! Great Things About Fecal SacsFor the first couple of days after hatching, parent robins actually eat many of their babies' fecal sacs. Growing Out of DiapersTo get rid of the fecal sacs of older babies, the parents carry them away.
It's worth the cost when nest sanitation is at risk, but as soon as baby robins leave the nest, they stop producing fecal sacs. How many times do the parents come to the nest with food? How many times do they carry away a fecal sac? Based on your 15-minute count, calculate the number of poops per hour. If the parents didn't carry it all away, how long do you think it would take for the nest to get filled to the top with poop? Fecal sacs aren't the only things parent birds carry away from nests to keep the nests clean.