An observation blind is like a "fort" that allows you to watch wildlife by camouflaging with nature. Since wild animals may not see the fort, they may come close to it, allowing you to observe wildlife close-up1.

Here is a cool site with directions for making a wildlife observation blind of your very own:

Wildlife Observation Blind

 

References:

1) (2008). Step by step observation blind. Retrieved April 12, 2009, from Animal Planet Web site: http://animal.discovery.com/fansites/backyard/projects/pallidbat.html