Cuckoo spit (spittlebugs) / RHS Gardening

Cuckoo spit is produced by the nymphs of sap sucking insects called froghoppers. It is harmless and the insects that produce it are part of the biodiversity a healthy gardens supports.

Photograph, Cuckoo Spit and Froghopper Nymph

Froghopper - Wikipedia

Cuckoo-Spit Spittlebug Froghoppers sighted at Cabrillo National Monument! - Cabrillo National Monument (U.S. National Park Service) - Cabrillo Field Notes

Country diary: how a glance at cuckoo spit led to trouble, Insects

Minnesota Seasons - meadow spittlebug

A Cute Common Froghopper Philaenus Spumarius Also Called Spittlebug or Cuckoo Spit Insect on the Stem of a Plant with Its Spittl Stock Photo - Image of closeup, england: 118295724

Why Is There White Foam On My Plants? Spittlebugs & What You Need To Know

Inside the Spittlebug's Bubble Home - The New York Times

We're all going on a bug hunt

Cuckoo Spit and Xylella

Why Is There White Foam On My Plants? Spittlebugs & What You Need To Know