In an attempt to figure out gender of my 4 indian fantails, I seperated them and introduced back to eachother in different possible combos. I noticed 3 have deep coos, and 1 is smaller and has a hushed coo. When I introduced the small one in with one of the larger ones, the large one began cooing loudly and walking around the small one. They then sat on a perch next to each and preened and then they would hold onto eachothers' beaks! Is this “kissing” and is it a good bet that this is a male and female pair?