There has been interest in a 'What is it?' thread where photos, or parts of photos, leave us guessing what objects are. I thought we could give it a try.
We hope not to have too many rules about posting. I think we'll just let it run to see how it goes. A single thread would probably be best. This works well for 'Photo-a-Day' and it should do for the 'What is it?' mystery photos. It's perhaps easier to scroll a single thread than it is to keep going from one thread to another. If the thread grows too big, I can always start another one every now and then.
I'd personally suggest that only one photo at a time runs. Post another only when the current one has been correctly identified. It could get confusing if a number of mystery photos are being guessed at the same time. We can see how that goes though. Maybe it would be good if those who have posted a photo and had it identified could hold back from posting for a few hours in order to give others a chance.
A delicate subject must be mentioned: We know all of the regular members here will only post suitable photos, or parts of suitable photos. However, on an open forum, anything is possible. It's not inconceivable that people we don't know could post anything. Because of this, I may sometimes ask to see an entire photo (or be told what it is)*. As the Moderator, I have to worry about and look after such aspects of the forum. No offence it meant. Needless to say that if anything unsuitable is posted, Admin. will not be pleased.
*Note: I promise not to subsequently post the answer and so appear to be a very clever guesser

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The 'What is it?' thread can be discussed here.
A thread has now been started for the photos.