BBC Wildlife Magazine - - Welcome - Liz Kalaugher

Sci­ence writer and Furry Logic co-au­thor Liz joins our Q&A ex­pert panel. “I’m ex­cited to be bring­ing you fas­ci­nat­ing facts about wildlife each month,” she says. “If it makes me go ‘wow’, I’ll write about it.”

Ham­mer­head sharks have wide heads (known as cephalo­foils) with their eyes on the ends, giv­ing them a great range of vi­sion. And it doesn’t seem to ham­per their abil­ity to swim. The scal­loped ham­mer­head, which is more than 3.5m long, has a head 120cm across, equiv­a­lent to ap­prox­i­mately 30 per cent of its body length. Yet it swims at the same speed for its size as the more slen­der­skulled bon­net­head ham­mer­head – up to 90cm long with a head that’s just 18 per cent of its body length. Video footage of the two species has re­vealed that they swim in dif­fer­ent styles to achieve the same rel­a­tive speed, though. Scal­loped ham­mer­heads, that have nar­rower bod­ies, un­du­late more quickly, while bon­net­heads bend fur­ther from side to side. Both species wag­gle their heads faster than their bod­ies as they swim, per­haps to help them sense their prey.

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