The search engine in the photo stock is a precise and fast tool. In the image caption you will find the key words by which you can find the photographs. Note that the words are, at the same time, links that allow you to move around in the photo stock using your mouse; the result obtained clicking on the links may be more accurate than that obtained through manual search. Use the keywords VERTICAL and HORIZONTAL to find images in the format you want. You can combine several words to make a search engine, but write them in a telegraphic way, avoiding articles and prepositions. If you already know the code of the image, you can enter it to find the image. For example: 001A329. Categories are another searching tool. They are displayed in a tree diagram and their role is to show the content of the photo stock in an organized way.
Remarks: The Cory's shearwater (Calonectris borealis) has been separated from Scopoli's shearwater (Calonectris diomedea). Both species are very similar; Cory's shearwater has dark underwing tips. In Canary Islands Cory's shearwater is the most abundant.