It is not likely that the other swan broke the swan's neck. Probably, there was an injury sustained from running away or running into something. In any case, there are no guarantees that the remaining bird will allow another swan in her habitat. If you would like more information, we have published a book that you can find on this website as well as our website, www.theregalswan.com titled Swans of the World Habitats: Setting the Standard for Swan Conservation.

The book addresses swan behavior, how to set-up and maintain a safe, secure and healthy habitat for swans. The Regal Swan