Duck Anatomy - Under Construction - Updated 3-24-2019 (warning, contains reproductive pictures)

[casportpony]

I read somewhere that ducks or maybe waterfowl only have one ovary is that wrong?

I think it is true.

Avian Ovary Asymmetry
During embryonic development, the left and right ovaries are presumably present in all birds, but in many species only a functional left ovary is maintained post-hatch.
Source: https://animalscience.psu.edu/research/labs/johnson/follicle-development

Reproductive Anatomy:

• Gonads - paired testes in males & usually a single ovary in females
• Ovary
  • most birds have only left ovary but 2 ovaries are typical of many raptors
  • contains from 500 to several thousand primary oocytes

Source: http://people.eku.edu/ritchisong/avianreproduction.html

 

[Miss Lydia]

Isn’t that interesting. Just always wondered why my goose Missy laid for her first 4 yrs then stopped laying. She’ll be 7 in April.

 

[Miss Lydia]

Is it also true that every female bird has a determined number of eggs and that is all she’ll lay in her life time? Maybe that was in the link you gave K but I didn’t see it in dummy language.

 

[casportpony]

Is it also true that every female bird has a determined number of eggs and that is all she’ll lay in her life time? Maybe that was in the link you gave K but I didn’t see it in dummy language.

I think that is true too.

 

[Fishkeeper]

It's true for most things with ovaries, I think. And to be clear, that's egg cells. Same deal with humans.

 

[Loopeend]

It's true for most things with ovaries, I think. And to be clear, that's egg cells. Same deal with humans.

Apparently babe female humans already have all the eggs they can have at birth. Some can have more then others. They ripe when becoming fertile. Generally speaking; someone who has a period early is more likely to have an early menopause. But since it can also differ from person to person how many eggs an invidual has at birth; it is not something you can count on to be a truth. Two persons getting the first period at an early age, 8 years old, one can have an early menopause or the other an menopause on the age expected because one is born with more eggs then the other. Plus you have all kinds of variety's like that some people have a higher chance to let móre then one egg go.. (twins often runs in the family)

I'm interested though why female ducks have a 'shut-down' overy. Is it because the system how the eggs comes out in a shell and quite really big icompared with our human egg? An evolutenairy adjustment?

 

[casportpony]

Time to add more!

 

[HuffleClaw]

Picked up my Call drake to put a leg band (for identification) on him and certain parts popped out. Idk if these are of any assistance to you but I remembered this thread and thought "why not"

Spoiler: Drake reproductive parts

 

[casportpony]

Picked up my Call drake to put a leg band (for identification) on him and certain parts popped out. Idk if these are of any assistance to you but I remembered this thread and thought "why not"

Spoiler: Drake reproductive parts

View attachment 1927198 View attachment 1927199 View attachment 1927200

Those are *very* helpful! Can you ask post those in my phallus thread? I'd like people to see what a healthy penis looks like.

 

[HuffleClaw]

Those are *very* helpful! Can you ask post those in my phallus thread? I'd like people to see what a healthy penis looks like.

Sure! Could you post a link?