The difference between a crow and a raven.

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A biologist was asked to finally determine whether crows and ravens are really two different birds. This has been a matter of some conjecture for quite some time. Given only a cursory glance, these birds appear to be one and the same. The biologist spent considerable time watching the birds in their habitat and logging hours of observations. Their beaks were the same, their feet and their bodies showed no variable difference. But, at last, a breakthrough. The long feathers at the tip of a birds wings, the pinion feathers, provided the conclusion that ravens and crows differ. A raven has four pinion feathers and a crow has five pinion feathers. So........................... The difference between ravens and crows is a matter of a pinion.

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