Two Images from the Web

This one's a dragon. I love dragons!

Where I got the picture: Google Image Search
Why this picture is a good example of jpegs:
Large solid blocks of color are easy to fill in, regardless of pixel loss.

This one's me talking about the computer! SHHH!!!

Where I got the picture: http://www.uni-leipzig.de/~kae/cartoons/computer.gif
Why this picture is a good example of gifs:
Black-and-white drawings render better even if areas of pixels are missing due to compression.