Green-crowned Brilliant is another of the mid-elevation hummingbirds fairly common in Costa Rica. I think this is the northern-most of the Brilliants. The male has a fairly distinctive posture with a somewhat almond-shape head and relatively short bill.
With the right light a little blue throat patch lights up, as does the green crown.
The female has a more speckled appearance that could be mistaken for a female Jacobin
The white stripe between the malar and the cheek is a good mark for her.
The immature male has an orangey malar stripe (and throat)
The Brilliants had a fairly distinctive feeding posture. Sometimes they would hover like most hummingbirds, other times they would somewhat perch with beating wings as they curved their body around the lip of the feeder.
I don't know if they adopt that posture when feeding on actual flowers.
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