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恐龍真的是paleontology「古生物學」裡頭的重要考題！因為恐龍百百種啊！真的都很有趣！考題出不完～

三月份的托福考題聚焦pterodactyl「翼手龍」，這個字p不發音，是Pterosaur翼龍當中的一種。題目主要在探討牠的覓食習慣，究竟是predator獵食者，還是scavanger採集吃腐屍者。

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People like to generalize the pterosaurs as a group. This is unwise; pterosaurs are incredibly diverse, just generally similar in body form due to the need to fly. What I’m trying to get at is that different species got food in different ways. So let’s do a run down here:

First off, not all pterosaurs were predatory. Look up Tupandactylus or Tapejara. Note the short, blunt beaks… not so good for killing, those beaks. Tapejarids were probably frugivores, though they may have picked up small animals sometimes.

Speaking of non-predatory, the istiodactylids had interlocking, serrated teeth; these may have scavenged for a living.

It was long believed that most if not all pterosaurs ate fish. Many did, but far from most. The pteranodonts were probably divers, like gannets are, alighting on the surface and swimming down to attack prey. Ornithocheirids would have been dip feeders, flying near the surface and plunging the beak in the snag a fish or a squid. So too were lake dwellers: the boreopterids, which probably lived similarly, but on a diet of freshwater fishes. Rhamphorynchids could have been either.

文章出處：https://www.quora.com/What-were-a-pterodactyls-enemies......

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