Frog Parasite Lifecycle

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Artwork for an article about the epidemic of frog deformities. The illustration traces the life cycle of the main culprit, a trematode, from being ingested by a bird, such as a heron, hatching and infecting snails, from which emerge a flagellated form which likes to burrow into tadpoles in the area where their legs are forming. The legs deform as a result, resulting in slow frogs that get eaten by birds, continueing the cycle. Pesticides, run-off from fertililzer, and solar radiation are included in the illustration as secondary causes of the deformities.


Scientific American Magazine