Alphabetical order sorting button: two options. "Alphabetical order" and "Reverse alphabetical order". Alphabetical order is the default.
One button per letter in the alphabet: their label is a letter from the alphabet, they must be unique, and they are displayed horizontally and alphabetically.
Acceptance criteria
GIVEN I am on the birds list page
WHEN I sort the list in reverse alphabetical order THEN the birds list is displayed in reverse alphabetical order.
GIVEN I'm using the list to find specific birds
WHEN I click on a button with a letter of the alphabet THEN I see a selection of birds whose vernacular name starts with the button's letter, displayed alphabetically.
List sorting buttons, labels and requirements
Acceptance criteria
GIVEN I am on the birds list page
GIVEN I'm using the list to find specific birds