The full-text search module provides an autocompletion input field to search the list of scientific and common species names. The default setting is that all different subsets of species names are marked. You can use your mouse or keyboard to select a species from the autocompletion list but you have to press "enter" a second time to submit your selection.
Note: If you just enter a single letter you will get the list of all species starting with this letter, depending on your selection of scientific, alternative and/or other names.