How to Find Public Domain & Creative Commons Images for Use
Open Google Image Search - www.images.google.com
Search for an image you would like to use
Now you will limit your images to only ones labeled for re-use.
First select ‘tools’ under the search bar
Then open ‘Usage Right’ and select ‘labeled for reuse.’
Find a picture from Wikimedia Commons or Flicker, as these typically work best if you need different pixel sizes. These two sites are well-known for offering Creative Commons & Public Domain images, others can be misleading.
Once you have gone to the Wikimedia Commons or Flicker Web page for the image, you should see different pixel sizes. You can select the size you need.
This should take you directly to a view of the image. Save the image to your computer.
Be sure to add proper caption & citation for the image for your use.