I found a bunch of pictures like these; no animals and a massive amount of flares. Probably the sun that triggers the sensor.
A mountain hare (2013-06-08, 02:49:08)
A mountain hare (2013-06-08, 02:49:22)
Hard to see, but it might be the same pine marten as on the next two pictures, which were taken a week later (2013-06-08, 22:34:11)
A pine marten (2013-06-15, 03:22:13)
A pine marten (2013-06-15, 03:22:14)
Some condensed water on the UV-filter, a flash and a bird at a really close distance makes for a nice picture! (2013-06-16, 06:13:29)
I triggered the camera while standing outside its field of view, giving a nice picture of some of the most annoying creatures billions of years of evolution has brought forth, mosquitoes! (2013-06-20, 17:59:59)