I also have 2 "transgender" calls who are now 3 years old. They both lay eggs but the eggs were always infertile (as expected). This past fall the more "male" female laid 11 eggs and bean setting for the first time. I noticed but left her alone for 2 weeks & then went to bust her up figuring the eggs were not fertile - thank goodness I candlelit the eggs before tossing them - 9 were fertile. Placed them in the incubator & all 9 hatched. 5 are males 4 females and so far they seem normal... I will say that these 9 have an array of color that was unexpected - mother & father are butterscotch but ducklings came out butterscotch, chocholate, grey and one that is what I assume is gray fawn. In the past with ducklings from this bloodline I have only gotten butterscotch. 3 of the ducklings are tiny as young adults, 4 are standard show size & 2 are larger than I normally like (pet qty size) but all but the largest one are uniform in conformation.
These 2 female calls are obviously "transgender" as you call it and have never allowed breeding by another male. Typically the group of 16 are split into breeding trios in late winter and then the group is put back together in fall in a large flight type pen. The 2 trans females generally are left in the flight pen with any other ducks that I am not trying to raise from. The other female trans's eggs were infertile as usual. Funny thing is that the one who laid fertile eggs in the fall is typically the more aggressive female who tries to breed any other female around and fights the males! Her color is typically female butterscootch (3rd generation that I have owned) but darkens to an almost male pattern in late fall & winter - not exact with the pattern but noticeably darker than my normal girls even when in molt. I never expected to have offspring from these two & honestly wasn't planning to breed them... but once I saw the eggs were fertile - i couldn't resist hatching them!
I hve had transgender ducks & chickens before in my 25 years of owning poultry but have never had successful breeding before and although it wasn't intentional - I am going to keep several of the small offspring & see what happens next generation. I am only a backyard breeder - I don't show - but strive for show quality in my breedings.... kept the two trangenders just because they had funky personalities and would never sell them to someone who wanted breeders. Can't wait to see what happens next year from eggs of these offspring. And I have no idea why this change occured.
