Now the fun part. Merlin asks you to help with four hints to make sure you are going to get the best match possible. (This sounds like a dating site) The first hint is to narrow the picture down to just a bird by clicking and dragging a box around the subject. The second hint is to click on the end of the beak, and then the eye as the third hint and finally the tip of the tail. The last three hints help because the distance between the three points creates a ratio, or a number that can be linked back to a certain species. A hummingbird, for instance, can appear much larger in a photo than an eagle depending on how far away the two birds are from the camera. This check between beak, eye and tail will be a similar ratio even if the bird is 10 times smaller in the photo.