Further to this Mr. W, a Tech Log entry is made when the pitot covers are installed and prior to return to service this coupon is signed off (by the gingerbeers) confirming their removal and as a general rule the actual covers will be shown to the crew.
I think somewhere around gate 19 or 20 there is a board of several different types of (unprotected) pitot tube out in the open “inviting” insects to set up home so they can be studied by the entomologists.