these to allow users of browsers which recognise them to navigate more
quickly in certain areas of the site.
There's a good explanation of how to use these keys on Wikipedia.
In the index of countries, pressing G moves the listing to the countries with names beginning with "G". The same applies to all other letters, except X which is used for "New on the Web". These keys also work on the home page.
In the species pages and country pages, the following are implemented