![2 New Zealand native mayflies and 1 nymph.](http://static.sciencelearn.org.nz/images/images/000/005/151/full/PCE_ART_08_NeonicotinoidInsecticides_Mayflies.png?1678727781)
Neonicotinoids are toxic to two native mayflies – Deleatidium spp. and Coloburiscus humeralis. They are also toxic to Deleatidium nymphs.
Deleatidium magnum adult (left) and nymph, Emily Roberts, CC BY-4.0. Coloburiscus humeralis adult, David Paulin, CC BY-NC 4.0. All images sourced from iNaturalistNZ.