Duckling sexing

[Soos-Quacken]

These are (probably) blue Swedish runner cross (runner was the mom). I don’t know if there’s any way to tell their sex without vent sexing (and that is definitely something I don’t want to do), but I’m wondering if there was anything you guys could deduce?

 

[nchls school]

You may be able to tell by vocalization. Males are quieter and a bit raspy sounding. Pick them up one by one and listen. Females will sound louder and may sound like more of a quack (these ducklings are young and their different vocalizations may not sound different).