Websites like FreePik, FreeImages and Morguefile contain free stock photographs of rats. Users can look for rat pictures by typing keywords and phrases into the search boxes, such as "rats," "rat in cage," "laboratory rat," "river rat" or "pet rat" to return images that are specific to the project that the user has in mind.
Some free stock photo websites contain images other than photographs, such as vector drawings or icons. Users can also narrow down their searches based on specific parameters. For example, FreeImages users can choose several options from a drop-down box, narrowing down the search results based on image size, upload date, the number of downloads and the number of comments each image has received.