the.com/spittlebug

the only insect that builds its childhood home out of its own butt foam

means A small plant-sucking insect whose nymphs surround themselves with a protective mass of frothy bubbles, also known as the froghopper in its adult form.

from A plain English compound, joining "spittle" (Old English spātl, the word for spit or saliva) with "bug" — because the foamy mass the nymph produces looks exactly like a gob of someone's spit clinging to a stem. The same froth gives the creature its other folk name, "cuckoo spit," from the old belief that the foam appeared around the time the cuckoo began to call — though it is, of course, the insect's doing, not the bird's.

foam fort
nymphs hide inside bubbly spit from their rear end
jump king
can leap 100 times its body length
g-force
launches at 400g, beating fleas easily
plant juice
survives on watery sap with no nutrients
fake spit
the bubbles aren't saliva, they're filtered plant fluid
for instance

meadow spittlebug — philaenus spumarius, foams on plants across europe and north america since the 1950s

xylella fastidiosa vector — philaenus spumarius transmits plant-killing bacteria in italy's puglia region, destroying olive trees

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