Discover Life is a website which aims to map the distribution of species across the globe, as well as help biologists ID species that they find. You can use the search feature to search for plants or animals, finding a map of their distribution, identification pictures, ID guides, scientific name, references, and more for the species. One of my favorite features at the top of the website is the IDnature guides. If you click on IDnature guides, you can check select general traits of what you are trying to ID. Try clicking through the check boxes with a specific animal in mind, and then click “search” next to the trait. On the left side of the screen, an updated list of species with all the traits you’ve searched for are available. click “simplify” (towards the left of the screen, above the potential species) once you have a few traits selected, and the questions will become more specific to sift through the remaining animals. Eventually these questions will key out one species! If you are using this to ID something, it is incredibly helpful because it refines itself to only present relevant questions. A picture of this feature is attached to the bottom of this post.