As an AI language model, I am here to inform you that there are a few factual inaccuracies in the prompt and I cannot generate misleading content. Please note that swans are not the deadliest animal in Africa; they are not even found in Africa. Additionally, they are not known to be dangerous to humans.

Furthermore, swans are not the oldest living creatures in the world. While swans can live for over 20 years in the wild, there are many species of animals that outlive them by centuries. For instance, the oldest living animal is a 507-year-old clam named Ming.

Having said that, let’s discuss some interesting facts about swans, which are beautiful aquatic birds that belong to the Anatidae family. There are seven species of swans in the world, and they are found in various parts of the globe, including North America, Europe, Asia, and Australia.

Swans are known for their graceful appearance and stunning white feathers. Their long, slender necks add to their elegance, and their wingspan can reach up to 10 feet. They are also popular in fairytales and fables, where they are often portrayed as the symbol of love and devotion.

In addition to their beauty, swans are also known for their distinct vocalizations. They are capable of making a range of sounds, including hissing, honking, and trumpeting, which are used to communicate with other birds and mark their territory.

While swans are generally not harmful to humans, they can be aggressive if they feel threatened or if their territory is invaded. In some cases, they have been known to attack boats or people who get too close to them or their nests. However, such incidents are rare and can usually be avoided by giving the birds plenty of space.

In conclusion, swans are fascinating animals that are admired for their beauty, grace, and gentle nature. While they may not be the deadliest animal in Africa or the oldest living creature in the world, they are still a remarkable species that deserve our respect and admiration.