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Fig. 1 | BMC Evolutionary Biology

Fig. 1

From: Sail or sink: novel behavioural adaptations on water in aerially dispersing species

Fig. 1

Spider behaviour on water surface. Sailing behaviour: linyphiid (a, c) and tetragnathid (b, d) spiders moving on the water surface with their legs (a, b) or abdomen (c, d) used as sails. When the abdomen was used the behaviour was referred to as upside-down sailing. A spider can sail stably even on turbulent sea salt water. Anchoring behaviour: use of silk as anchor to slow down or stop movement on water surface by linyphiids (which dropped the anchoring silk) (e) and the tetragnathid (which dragged the anchoring silk after it caught a floating object) (f). Each scale bar represents 1 mm

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