A life bird for me, taken last month during our trip to the interior of BC.
A quick note about 3rd party use I was ranting about sites using my photos, particularly the photos that had been in Explore. After some investigation here is what I found, Flickr thrives on 3rd party use that is what they are all about "sharing" . So what to do? Go into your settings and remove your photos from 3rd party use, sitewide searches, the works. Your views are reduced plus you will never have any chance of being in explore in the future, not an exciting option is it? I've done it but not sure that I will keep it feeling like I have been throttled back. A very close friend said to me, " how much money are you losing?" I replied "I don't sell much really none" he then said, "quit worrying about it and let it go, the only way to stop it is to take your photos off the internet." So based on the premise Flickr is a "sharing platform" we have to learn to live with it or move to another site that may not be any safer, photos will be stolen if they are on the internet.
Sorry, I don't have better news, I did find out if you are unhappy about your photos being on sites that offer free downloads you can email them and request they remove your work, some people have had success according to what I found in the Flickr forum.