Since you raised the young birds and not the mother swan, they have no idea about predators and will need to be protected at all costs. So, they will need to come in at night to be protected from predation. Also, during winter months, the coyotes will go onto solid ice to kill birds stuck in the snow and ice. This will be another time when the swans will need to be placed inside, especially if they do not know how to protect themselves from inclement weather.

Humans raising swans and other animals is the reason that the creatures must be protected. We cannot talk to them and explain things that the parent bird/animal can and this leaves young birds/animals to learn by themselves. Unfortunately, this can lead to their being killed.

As far as the black swan, go ahead and bring it indoors with the young cygnets and see how it responds. It may be okay around the younger birds because they do not look like a threat at this time. See if there is any aggressive behavior, i.e., nipping, chasing, etc. Keep a close eye on the birds and their interaction. If there is minor aggression at the first and then it abates, it may mean that there is acceptance. If there is continual nipping or even more aggressive behavior, the swans cannot be placed together.

Swans either accept or do not accept other swans based upon individual behavior. Even though black swans are more aggressive than other species (and we have seen in some instances, this is not the case based upon how the birds are raised), they can still get along with other swans. We hope this information is of benefit. The Regal Swan