We were up at Estes Park for the day to take photos of landscapes and Elk. Everything seemed normal, clear sky and lot's of sun. We didn't notice anything while we were out taking photos. The next day when we were looking at our photos we notice on a couple of them there was 3 white spots..doesn't look like dust or bugs on the lens.. When we came to this one photo we notice this long silver looking object. It doesn't look like any plane we have ever photographed before..most planes you can still make out the tail even if it's very small and far away. Not sure what this is but found it interesting. it's above the tree-line on the left side of the first photo (UFO 1)time stamped at June 9, 2015 at 10:56 AM. As you can see in the next photo (UFO 2) the 3 lights seem to have moved closer and you don't see the silver looking object time stamped at June 9, 2015 10:57AM. In the third photo (UFO 3) you will see the three lights have moved again and if you look on the inside of the right group of trees you can see the silver object again time stamped at June 9, 2015 10:57 AM.. You will need to zoom in/in large the photos to see this better...Taken with a Nikon D7000 with a 55-300mm Nikkor lens with VR We have just never seen this kind of thing in any of our photographs..