Assertion: red tailed tropicbird | /r/CapableOf | dive to a depth of about 4.5 metres
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text: The red-tailed tropicbird is mostly a plunge diver , diving anywhere from an above-water height of 6 to 50 metres (20 to 164 ft), to a depth of about 4.5 metres (15 ft), although this may change seasonally.