Assertion: hummingbird's body temperature | /r/HasProperty | ~40° c or 104° f
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text: : They are unique among birds because of their small size (2 - 20 g or 0.07 - 0.7 oz ), elevated average body temperature (~40° C or 104° F), and rapid heart rate (up to 1,260 beats per minute) (Johnsgard, 1983).