Yes. Especially if you introduce new females into a group of females that have established territory.
Yes, females and males will fight with each other. They have small fights that are just a pecking order. The males can hurt each other if there is a female to fight over.
no they don't fight with each other
NO female bettas do not fight each other
to fight over the female
The males are territorial. They will fight each other for a female. They will fight each other to be the top male. You should keep breeding males seperate.
yes they do the males fight each other over the female the female fights against other bears to defend their cubs or home food etc
NO. Ducks are not meat-eaters. They eat mostly things like grass. But they do fight with each other.
No, but if they are male mice they will fight for dominance
Everyone except ducks.
no it won't they compete against each other in a fight.
yes. the male may KILL the female
yes my Muscovy ducks killed 2 of my Giant Peking ducks