Roman Willi / Jumping spider (Heliophanus sp.) spiderling emerging from entrance to egg sac and waving mandibles before retreating, Lucerne, Switzerland, July 2019.
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Roman Willi / European hornet (Vespa crabro) feeding on nectar from Arborescent ivy (Hedera helix arborescens) flower, Lucerne, Switzerland, September.
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Roman Willi / European hornet (Vespa crabro) feeding on nectar from Arborescent ivy (Hedera helix arborescens) flower, Lucerne, Switzerland, September.
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Roman Willi / White-throated dipper (Cinclus cinclus) calling from rock in river whilst looking around, Lucerne, Switzerland, January.
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Roman Willi / White-throated dipper (Cinclus cinclus) calling from rock in river whilst looking around, Lucerne, Switzerland, January.
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Roman Willi / White-throated dipper (Cinclus cinclus) preening whilst standing on rock in river, Lucerne, Switzerland, January.
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Roman Willi / White-throated dipper (Cinclus cinclus) perching on rock in river and defecating, before diving beneath water, Lucerne, Switzerland, January.
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Roman Willi / White-throated dipper (Cinclus cinclus) engaging in courtship display as another dipper perches on rock and dives beneath water. Mallards swim in river behind, Lucerne, Switzerland, January.
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Ripan Biswas / Fish-eating spider (Nilus sp.) feeding on fish, West Bengal, India, October.
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Roman Willi / Fer-de-lance (Bothrops asper) juvenile resting on a Heliconia (Heliconia sp.) branch and tasting air with tongue, Osa Peninsula, Costa Rica, November.
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Roman Willi / Tracking shot of Allen's coral snake (Micrurus alleni) slithering across forest floor, Osa Peninsula, Costa Rica, January.
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Roman Willi / Cat-eyed snake (Leptodeira septentrionalis) swallowing Tree frog (Smilisca sp.), Osa Peninsula, Costa Rica, November.