When conducting an online search for an image to use as a reference, consider the following:
And remember, if you can’t find what you are looking for online, try taking your own reference photos.
When in doubt, don't use the image.
Image attribution, or giving credit to the creator of the image that you are using, should include the following details:
Example in APA citation format:
Wang, J.C. (2008). Bur oak [Photograph]. Flickr https://bit.ly/2RZ6zIk
Example of Creative Commons license attribution:
"Ottawa, Parlamento," by Angel de los Rios, licensed under CC BY-SA 2.0.