Why are Mallard drakes such violent sex pests ?

[WildRosie]

Yesterday evening, I saw a hapless female Mallard being relentlessly pestered by two drakes. It wasn't a pretty sight but eventually our heroine managed to fly off and escape her unwelcome suitors. Do all duck family birds behave like this or is it just a Mallard thing ?

Oh dear. Swans too. I knew they were territorial but I thought that was just to protect the pen and cygnets.

More Frankie Howerd

@BadNomad I think that's weasels.

I think there was a sealion that got into the habit of catching and raping penguins. I think it was one individual seal. I could be mistaken but I don't think it was a widespread habit.

There's also a species...no actually that's enough!

Seal or sea lion - two different animals.

Actually fur seals, so I'm not certain. But definitely more closely related to sealions than to true seals like the grey seal (who can also be rapey bastards).