Hi there, call duck eggs can be bit tricky to incubate. Would advise reading up on incubating them. 28 day incubation , maybe bit less as small.Cool from day 7 to day 24 by switching off incubator for at least 20 mins to 2 hrs per day. Moisten with spray or sponge from day 7 to day 24. Turn well up to day 24. Just guidelines. 37.5 degrees. Not sure of humidity. My incubator full so not tried these out but the pair are v active. I've successfully incubated shetland duck eggs using that method but they're just guidelines that worked for me. Best under a broody. I can post or you collect.