Greek proverb: Ἀετὸς μυίας οὐ θηρεύει

Here's a saying from Apostolius, C1.44, with a Latin version from Clavis Homerica. The image is by alana sise at Flickr. Here are some more Apostolius proverbs.

Ἀετὸς μυίας οὐ θηρεύει.
Aquila non venatur muscas.
An eagle doesn't hunt flies.