20-11-2017 LAKESIDE THURROCK, ESSEX - MUTE SWAN (Cygnus olor)

Mute Swans form strong pair bonds and have few natural predators. They will vigorous defend nests and attack human intruders. The male is properly called a "cob," the female a "pen." Young Mute Swans are called cygnets.

Mute Swans form long-lasting pair bonds. Their reputation for monogamy along with their elegant white plumage has helped establish them as a symbol of love in many cultures. The Mute Swan is reported to mate for life. However, changing of mates does occur infrequently, and swans will remate if their partner dies.

Hearing the wail and unable to make it stop, Apollo struck down Cycgus, forcing him to live the rest of his life as a Mute Swan. As the myth would have it, Mute Swans continue to live their life in absolute silence to this day until, just moments before their death, they wail one last mournful song.

The total native population of mute swans is about 500,000 birds at the end of the breeding season (adults plus young), of which up to 350,000 are in Russia. The largest single breeding concentration is 11,000 pairs in the Volga Delta.

If a mate is lost then the surviving mate will go through a grieving process like humans do, after which it will either stay where it is on its own, fly off and find a new stretch of water to live on (where a new mate may fly in and join it) or fly off and re-join a flock.

Mute swans are large and aggressive birds. As adults they are not often preyed on unless they are old or ill. Eggs and hatchlings are vulnerable to nest predation by raccoons, mink, and a wide variety of other medium to large-sized predators. But swan parents are typically present to protect their young.

The mute swan's name comes from the fact that it's less vocal than other swan species, such as the whooper swan that makes the distinctive 'whooping' call in flight. The mute swan is also the largest of the swan species in the UK, and in fact the second largest species of waterfowl in the world. Mute swans do not migrate and are a permanent resident all year round, unlike the Bewick and Whooper swans who are winter visitors to these shores. The male swan is called a cob and a female is called a pen and group of swans is called a herd. Swans are highly intelligent and have sharp vision and impeccable hearing.

The mute swan (Cygnus olor) is a species of swan and a member of the waterfowl family Anatidae. It is native to much of Eurasia, and (as a rare winter visitor) the far north of Africa. It is an introduced species in North America, home to the largest populations outside of its native range, with additional smaller introductions in Australasia and southern Africa. The name "mute" derives from it being less vocal than other swan species. Measuring 125 to 160 cm (49 to 63 in) in length, this large swan is wholly white in plumage with an orange beak bordered with black. It is recognisable by its pronounced knob atop the beak, which is larger in males.

Mute swans nest on large mounds that they build with waterside vegetation in shallow water on islands in the middle or at the very edge of a lake. They are monogamous and often reuse the same nest each year, restoring or rebuilding it as needed. Male and female swans share the care of the nest, and once the cygnets are fledged it is not uncommon to see whole families looking for food. They feed on a wide range of vegetation, both submerged aquatic plants which they reach with their long necks, and by grazing on land. The food commonly includes agricultural crop plants such as oilseed rape and wheat, and feeding flocks in the winter may cause significant crop damage, often as much through trampling with their large webbed feet, as through direct consumption. It will also feed on small proportions of aquatic insects, fish and frogs.