Morley Read / Rio Faisanes stubfoot toad (Atelopus coynei), Carchi Province, Ecuador, 2017. Critically endangered. (non-ex)

Nigel Cattlin / Harlequin ladybird (Harmonia axyridis) larvae still with a raft of empty egg cases, June Berkshire, England, UK.

Chien Lee / Minden / Black-headed Cat Snake (Boiga nigriceps) swallowing alive Harlequin Flying Tree Frog (Rhacophorus pardalis) prey, Kubah National Park, Sarawak, Malaysia, sequence 1 of 4

Chien Lee / Harlequin Poison Dart Frog (Dendrobates histrionicus), Utria National Park, Colombia

Lucas Bustamante / Rio pescado harlequin toad (Atelopus balios) pair on branch, female on the left, Azuay, Ecuador, Critically endangered species, possibly extinct.

Alex Mustard / Harlequin sweetlips (Plectorhinchus chaetodonoides) cleaned by a pair of bluestreak cleaner wrasse (Labroides dimidiatus). South Atoll, Tubbataha Atolls, Tubbataha Reefs Natural Park, Palawan, Philipp...

Cyril Ruoso / Harlequin grasshopper (Zonocerus variegatus) Democratic Republic of the Congo. Non-ex

Stephen Dalton / Harlequin ladybird (Harmonia axiridis) on end of leaf, invasive species. Sussex, England, UK. March.

Stephen Dalton / Harlequin ladybird (Harmonia axyridis) in flight, invasive species, England, UK. March.

Chris Mattison / Harlequin Flying Frog (Rhacophorus pardalis) on leaf, Danum Valley, Sabah, Borneo,

Chris Mattison / Harlequin Flying Frog (Rhacophorus pardalis) on leaf, Danum Valley, Sabah, Borneo,

Franco Banfi,Franco Banfi / Ornate ghostpipefish, (Solenostomus paradoxus) Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean