Higher-end cameras that offer infrared image capture is an alternative. Images will be black and white, but color is not essential for determining the presence or absence of deer.
Better trail cams also offer video mode. This is great to have, but it will use batteries more quickly. Alternatively, "burst mode" takes several images over the course of a few seconds and gives a better idea what deer are doing.
Trigger time is the lapse of time from when the motion sensor trips the camera until the shutter fires. This is usually less than one second.
Finally a time-lapse mode can be valuable for detecting wildlife over a period of time. Some cameras can be set to take images every few seconds, every few minutes, or even hourly. This feature is especially useful for scanning activity on a large open field.
And trail cams can be used for many purposes other than finding big bucks. If you've got a mysterious creature coming into the backyard at night and raiding the bird feeder or emptying trash cans, an image or two can identify the culprit. Or if you see a creature you can't identify, a trail cam is invaluable. A camera focused on a bird feeder, for example, can quickly determine if night raiders are flying squirrels, raccoons, or opossums.
And when not being used for wildlife photography, trail cams can double as home security devices. Positioned to capture images at porches and doors, trail cams can help identify home intruders.
If it sounds like I'm trying to convince myself to buy a trail cam, I am. At $100 to more than $300, trail cams are not cheap, so buyers should know what features they want before making a purchase. I know getting images of deer will be easy, but I'd like to catch a coyote, bobcat, or bear.
For more information, search "trail cam information" online and you'll be busy for hours.