Add random-d.uk to Animals :)

README.md

@@ -75,6 +75,7 @@ API | Description | Auth | HTTPS | CORS |
 | [PlaceDog](https://place.dog) | Placeholder Dog pictures | No | Yes | Yes |
 | [RandomCat](https://aws.random.cat/meow) | Random pictures of cats | No | Yes | Yes |
 | [RandomDog](https://random.dog/woof.json) | Random pictures of dogs | No | Yes | Yes |
+| [RandomDuck](https://random-d.uk/api) | Random pictures of ducks | No | Yes | No |
 | [RandomFox](https://randomfox.ca/floof/) | Random pictures of foxes | No | Yes | No |
 | [RescueGroups](https://userguide.rescuegroups.org/display/APIDG/API+Developers+Guide+Home) | Adoption | No | Yes | Unknown |
 | [Shibe.Online](http://shibe.online/) | Random pictures of Shiba Inu, cats or birds | No | Yes | Yes |