No way to tell. If they are small ducks and low and fast teal. If they are full size ducks this time of year Mexican whistlers. If they clean out a feeder every morning that is what they are for sure
If they are slow whistlers. They also fly more spread out. These ducks are obviously locking up so hard to tell but teal are little rockets and easy to tell
If they are teal, you will know very quickly, just by the sound they make, when they fly over. They sound like some turbo prop plane going over. Looking at that picture, I would say, definitely not teal.
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