Having a ruby gorget of feathers like metallic scales, as a humming-bird.
The Century Dictionary (Public Domain)
Use "ruby-throated" in a sentence
"(I like to garnish the plates with ruby-throated nasturtium blossoms from the garden ... makes it even more beautiful!)"
"The ruby-throated hummingbird prepares for its annual 800km non-stop flight across the Gulf of Mexico, by an intense pre-flight eating binge which increases its body weight by about 50%."
"And I passed what I took at a glance to be a large species of white-backed dragonfly hovering over some flowers that it dawned on me later could have been a ruby-throated hummingbird."