Danny Green / RF - Arctic fox (Alopex lagopus) sitting with summer pelage, tuft of fur on head. Svalbard, Norway, July. (This image may be licensed either as rights managed or royalty free.)
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Bernard Castelein / Cotton Grass (Eriophorum vaginatum) growing in water. Goldenstater Moor, Niedersachsen, Germany.
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Solvin Zankl / Cornflower seeds (Centaurea cyanus). Cornflower seeds are partly dispersed by ants and also carry a tuft of hygroscopic (water-absorbing) fibres that expand when wet and retract when dry, thus driving...