Does a Swan Croaks?

Calls. Mute Swans aren't mute, but their hoarse, muffled trumpet or bugle call given during territorial defense doesn't carry like the calls of other swan species. Mute Swans also make an explosive snorting or hissing when threatened or disturbed. ... When in a group Mute Swans growl, whistle, and snort at each other.

Does a swan hiss?

"If you approach a swan nest on the river, they might get aggressive and hiss and flap their wings, but the danger is over-rated and it's a myth that they will break your leg or arm with their wings.

What sound does an angry swan make?

Although the mute swan (as its name suggests) does not have a distinctive call it does make a range of loud snorting or hissing sounds when angry or disturbed. In flight, the large and powerful wings of the mute swan make a rhythmic whistling 'wou wou' sound.