Sources : Falcon

Aelianus [170-230 CE] (On the Characteristics of Animals, Book 2, chapter 42): Falcons are excellent at fowling and are in no way inferior to eagles; they are by nature the tamest of birds and the most attached to man; in size they are as large as eagles. And I am told that in Thrace they even join with men in the pursuit of marsh-fowl. And this is how they do it. The men spread their nets and keep still while the falcons fly over them and scare the fowl and drive them into the circle of nets. For this the Thracians allot a portion of their catch to the falcons and find them trusty friends; if they do not do so, they at once deprive themselves of helpers. Now the full-grown falcon will fight both with a fox and with an eagle; with a vulture it frequently fights. But a falcon will never eat the heart, thereby presumably fulfilling some mystic rite. If a falcon sees the dead body of a man (so it is said), it always heaps earth upon the unburied corpse, though Solon laid no such injunction upon it, and will never touch the body. And it even refrains from drinking if a solitary man is engaged in leading off water into a channel, feeling sure that it will cause damage to the man who so labours if it purloins the water which he needs. But if several men are engaged in irrigating, it sees that the stream is abundant and takes its share from the loving-cup, so to speak, which they offer, and is glad to drink. - [Scholfield translation]

Isidore of Seville [7th century CE] (Etymologies, Book 12, 7:57): The capus is named in the language of Italy from ‘seizing’ (capere). We call this one the falcon (falco), because its talons are curved inward. - [Barney, Lewis, et. al. translation]