I just picked mine up from the woods to get my last roll developed. It was out for 3 weeks in the freezing cold & only got 4 pics besides me going out to check it. Then it got warm & filled up in a week. It seems to work in the cold if the deer are hanging around it but gets real iffy if theyre just passing by. I was feeding them earlier in the winter & would fill a roll in a day or 2 but you could tell by the food pile that I was missing alot. I stopped feeding them & even tho I know they were walking by it I missed alot till it got warmer.