Tony Wu / White-spotted pufferfish (Arothron hispidus) being cleaned by Bicolor cleaner wrasse (Labroides bicolor) Ambitle Island, one of the two islands in the Feni Island group, New Ireland, Papua New Guinea.

Alex Mustard / Harlequin sweetlips (Plectorhinchus chaetodonoides) with cleaning Bluestreak cleaner wrasse (Labroides dimidiatus) and Bicolour cleaner wrasse (Labroides bicolor) South Atoll, Tubbataha Atolls, Tubbat...

Roland Seitre / Bicolored antbird (Gymnopithys bicolor) Gamboa, Panama city region, Panama.

Roland Seitre / Bicolored antbird (Gymnopithys bicolor) Gamboa, Panama city region, Panama.

Konrad Wothe / Bicolored tabby kitten in garden, Germany

Konrad Wothe / Bicolored kitten in climbing apple tree, Germany

Paul Harcourt Davies / Crown daisy (Chrysanthemum coronarium) showing both the yellow variety and the bicolored form (C. coronarium var discolor) Crete, April

Luiz Claudio Marigo / Bicolored Wren (Campylorhynchus griseus) in the Tropical Rainforest of Sierra Nevada de Santa Marta Natural National Park, near Minca village, Northern Colombia.

Murray Cooper / Bicolored Wren (Campylorhynchus griseus) foraging amid lichen, Colombia

DAVID TIPLING / Bicolored Antbird / Antcatcher {Gimnopithys leucaspis bicolor} at ant swarm Pipeline Road Soberiana NP, Panama.

Michael & Patricia Fogden / Bicolored Quill-nosed Snake (Xenocalamus bicolor) portrait, close up, southern Africa

Michael & Patricia Fogden / Bicolored Quill-nosed Snake (Xenocalamus bicolor) coiled, southern Africa