I have 2 pairs of mandarins, a pair of Woods, and a pair of hooded mergansers. This morning for the first time I noticed one was being quite loud. I could hear it from inside the house. I am pretty sure it's not the Mergansers. The male hooded does make a loud noise once in a while in the morning but this one was different. The noise was a series of short loud noises that happened every couple minutes. Almost sounded like a quack. Could this mean they are getting ready for breeding? The hoodeds are 2 years old, and the mandarins and woods are one year old. They are all fully colored. I am building nest boxes this weekend. I am hoping the noise calms down. The neighbors are very close and I went with these breeds because they are supposed to be very quiet.