IEC 60721-2-7:2018(E) addresses the occurrence of fauna and flora, including its main effects on electrotechnical products. Exposure and damage from the effects of fauna and flora can occur at almost any time in a product's life cycle. Moreover, there are many agents of attack with various actions. This second edition cancels and replaces the first edition published in 1987. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - This edition has been entirely rewritten.