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I believe the first part of your question refers to the night's blue-black embers giving way to the gash-gold vermillion of daylight.
As for the second part of your question (cut off above), are you asking if the falcon is connected to the Windhover? If so, the bird might possible be a falcon in reality. The bird is said to hover and scan...... falcons are sent out to scan the countryside for prey. They're beautiful to watch in the sky.