Roland Seitre / Harlequin Poison Dart Frog (Dendrobates histrionicus) in defensive posture, native to South America
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Paul Hobson / Harlequin Ladybird (Harmonia axyridis) melanic form, on turning leaf. Sheffield, October.
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Chris Shields / Illustration of Kidney-spot ladybird / Harlequin beetle (Chilocorus renipustulatus).
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Chris Shields / Illustration of Harlequin ladybird (Harmonia axyridis), four colour variants.
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Steve Knell / Harlequin duck (Histrionicus histrionicus) portrait of male stood motionless on exposed rock, in river, Iceland, May
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Steve Knell / Harlequin ducks (Histrionicus histrionicus) male chasing female on riverbank, Iceland, May
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Steve Knell / Harlequin duck (Histrionicus histrionicus) male standing in rapids, Iceland, May
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Tim Laman / Harlequin Tree Frog (Rhacophorus pardalis) in the air with webbed feet spread to glide, Danum Valley Conservation Area, Sabah, Borneo, Malaysia
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Stephen Dalton / Harlequin beetle (Acrocinus longimanus) close up, portrait
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Stephen Dalton / Harlequin beetle (Acrocinus longimanus) in flight, Venezuela, South America.
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Gerrit Vyn / Two pairs of Harlequin Ducks (Histrionicus histrionicus) in flight. Ocean County, New Jersey, USA, January.
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Stephen Dalton / Green mosaic / Rancho grande harlequin frog (Atelopus cruciger) walking along tree trunk, Henri Pittier NP, Venezuela, South America, Critically endangered, thought extinct until a gravid female was f...