My room has become a black hole for whistles, but only in the key of D! Any other key stays exactly where I put it last, but the high D ones have an alarming tendency to walk away. Does anyone else have itinerant whistles?
Actually no. I tend towards OCD (obsessive compulsive), everything in its place. Once in a while, I forget to unpack a whistle that I took somewhere, but other than that the whistles sit in an area that looks like a wine rack made out of paper towel tubes. I did leave a whistle at a grocery store, but quickly went back to claim it. I also had one whistle stolen, but that was with an entire bicycle and its contents. Maybe your lost whistles are in the same black hole that the unpaired socks go to. I’m sure if you call out to them gently they will find their way home.
- Bill
I strive not to have itinerant anything, as my vision is so pathetic that I cannot find anything that is not in its accustomed place. Should any whistle be anywhere other than on the coffee table or my desk . . . well, I shudder to think about what I would have to go through to get the police and the EMS to understand what they were looking for . . . 
I like to have a fixed place for everything - somewhere in the house.
I don’t really get more defined than that, so I regularly lose things six seconds after putting them down. Glasses are the worst, and can be hiding just about anywhere. If I had to wear them all the time it would be different, but as I only usually wear them for TV or driving, I can set them down on the TV, the table, the side table, the fridge, the bookshelves, the mantlepiece, the windowsill halfway up the stairs, the bathroom, by the computer, by the sink, etc etc. There’s always a good reason why I put them where I did, but I usually don’t remember it.
I like to pretend this displays a healthy lack of desire for worldly possessions, and that my mind revolves around higher thoughts, but it’s really just that I’m absent, er, that thing.
To stay on topic, I had to stop playing whistle and switch to an instrument less easy to lose down the back of the sofa, the fiddle. Then I took up bodhran as a back-up so I could lose the tippers.
One whistle went “walkabout” several years ago. I had one that I don’t even know the brand of - it was gold colored with a red mouthpiece. Bought it probably 15 years ago and halfheartedly tried to learn to play it. Put it away someplace, then a few years ago I went to look for it and couldn’t find it. So after a couple of more years I bought a Meg, then last year my husband bought me a Clarke original. I still know where those are.
Peggy said – I strive not to have itinerant anything, as my vision is so pathetic that I cannot find anything that is not in its accustomed place.
Welcome to the club. Without my glasses I’d have my nose right up to the monitor to see the computer.
No whistle eating black hole here (thank goodness). My blackhole likes to eat other things though like pens and pencils, chapstick, socks and bottles of lotion.
One could say I’m just careless with such items, but it’s much nicer to think there is some outside force at work like a tiny black hole that just sucks them up when no one is watching.
Really though, by chance do you have a couch or similar in that room of yours? We moved our last couch and heard stuff rolling around inside so we pulled back a section of the liner underneath and found all sorts of things (other than popcorn and cherrios). When something becomes seriously missing in my house, the underneath, behind and insides of the furniture immediately become suspect.
Or perhaps there’s someone else around your place who has a kleptomania weakness when it comes to high D whistles. 
Either way, good luck on the whistle keeping. Maybe you should invest in a lock box for them? 
Sara