Aggressive duck

[Kayuduck]

I've had the silver color duck for 8 years already. I adopted him through someone who felt sad for him being lonely on a porch. I had a hybrid drake at that time, he passed away years ago. The lady told me he is a runner. He acts like one, walks like one but he has a wider body. He walks upright like a runner. Could he be a mix of a runner and something else?
He's aggressive with all ducks I've tried adopting. He rapes them or tries to and I have to separate them. In the picture is my Cayuga I rescued last August. They were getting along great but couple weeks ago he tried or did rape him and my Cayuga not doing good. I separated them at once.
What is your opinion on his breed?

 

[sourland]

Looks like a runner in that picture.

 

[EggSighted4Life]

He rapes them or tries to

Hi, hope you are enjoying BYC!

Please understand that mounting is a sign of dominance and is not rape at all. Even females will do that to one another. Being territorial and setting a pecking order with any new comers and pecking order being dynamic thereafter is very common in many fowl.

Sorry your cayuga is not doing well. I hope he starts feeling better soon!

 

[Kayuduck]

Looks like a runner in that picture.

Hi, hope you are enjoying BYC!

Please understand that mounting is a sign of dominance and is not rape at all. Even females will do that to one another. Being territorial and setting a pecking order with any new comers and pecking order being dynamic thereafter is very common in many fowl.

Sorry your cayuga is not doing well. I hope he starts feeling better soon!

Hi! Thank you for the insightful response. I've had Pepe for 8 years and he has always displayed that behavior and we always thought he was raping. He did injure the cayuga's eyes
He also hates doves, he chases them in my garden. I don't know what the poor doves ever did to him, he killed one last year. I have to partition an area for him so he doesn't kill anymore doves.
I have bird feeding stations.
Thank you and yes, I'm enjoying BYC

 

[sourland]

A drake is capable of sexually assaulting another drake or a chicken hen. In most cases it is far more than just a sign of dominance. Mounting without sexual penetration is a sign of dominance.

 

[Kayuduck]

A drake is capable of sexually assaulting another drake or a chicken hen. In most cases it is far more than just a sign of dominance. Mounting without sexual penetration is a sign of dominance.

Goodness! A hen?
I have seen him with his thingy hanging out and he starts going around and around. I have brought home several ducks at different times. People dump domestic ducks in a pond near our home. One was a female Pekin, he wouldn't leave her alone. I took her and the ducks after her to a rescue.
This time I kept the Cayuga, I always wanted one or more. All was good till few days ago. He started harassing the Cayuga.
They are separated now.

 

[sourland]

Drakes have penises - roosters do not. Drakes breeding chicken hens can injure/kill them.

 

[Kayuduck]

Drakes have penises - roosters do not. Drakes breeding chicken hens can injure/kill them.

I can imagine
Maybe not good idea to keep them in same area.
I love hens and roosters but can't have any here (HOA). I had to fight to keep my 2 ducks.
I love how the roosters defend the hens from hawks.

 

[Kayuduck]

Drakes have penises - roosters do not. Drakes breeding chicken hens can injure/kill them.

My aggressive duck has killed my Cayuga. I separated them as soon as I saw him trying to rape my Cayuga but I wasn't sure he actually did. My Cayuga was healthy as can be until this happened. I'm now assuming he raped and killed him. He stopped eating at that point...I brought him inside the house...did good for a couple days but went downhill from there. I only had him for 6 months loved that little guy, so sweet. The rapist I've had for 8 years and soon to be 9.
I will not have anymore till he is gone.