How to get rid of these Wyverns?

I am on an ultimate ironman profile and got these two wyverns somehow. I want to get rid of them because they take up valuable space.

Thanks

 

For the whistle, drop it.
If you can't, here what you're going to want to do.

Have it in your inventory. Get something easily obtainable in large quantities (emeralds work quite nice for this). Fill the remaining slots in your inventory with emeralds (as in like pick up a stack and left drag over every slot). You will still have a few on your mouse, pcik up the flute to swap them. Exit your inventory, then /class or relog.

 

Thanks. These whistles don't have reigns so I can't drop them