Reassuringly, it's not spit at all, but foam made by a harmless insect called a froghopper - also known as a spittlebug. If you look closely, you will see a delicate, green baby froghopper nestled ...

Find out what other plants butterflies like. This strange foam found on plants is a protection bubble formed around froghopper insects. They make it while they are in their juvenile stage by blowing ...