Juergen Freund / Paralytic tick (Ixodes holocyclus) with engorged body on human hand, this species affects many species, Spectacled flying fox (Pteropus conspicillatus) among them and infects them with a toxin that ca...
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Alex Hyde / Green Dock Beetle (Gastrophysa viridula) female with huge abdomen swollen with eggs. Peak District National Park, Derbyshire, UK. May.
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Espen Bergersen / Adult male King eider (Somateria spectabilis) close up portrait, Batsfjord, Norway, March.
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Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Nasa' aged 25 years close-up of estrus swelling . Gombe National Park, Tanzania. September 2014.
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Nigel Cattlin / Apple (Malus domestica) buds swelling prior to leaves and flowers emerging in spring. Berkshire, England, UK. April.
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Nigel Cattlin / Clubroot (Plasmodiophora brassicae) distorted root of a Cabbage (Brassica oleracea). England, UK.
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Alex Hyde / Leech (Hirudinea) swollen with human blood, Maliau Basin, Sabah, Borneo.
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Alex Hyde / Leech (Hirudinea) swollen with human blood, Maliau Basin, Sabah, Borneo.
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Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 2 years inspecting the estrus swelling of his adolescent sister 'Glitter' aged 13 years. Gombe National Park, Tanzania.
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Anup Shah / Southern or Sunda Pig-tailed macaque (Macaca nemestrina) female with sexual swelling due to estrus sitting on a branch . Wild but used to being fed by local people. Gunung Leuser National Park, Sumatr...
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Anup Shah / Celebes / Black crested macaque (Macaca nigra) female with swelling of sexual skin to indicate she is in estrus, Tangkoko National Park, Sulawesi, Indonesia.
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Anup Shah / Celebes / Black crested macaque (Macaca nigra) female showing swelling of sexual skin in estrus, Tangkoko National Park, Sulawesi, Indonesia.
