Yes, two more swans would cause great problems for you and the swan that you now maintain. Additionally, there are no guarantees that your swan will accept another swan especially if it is a male.

Male swans will go about their lives without re-pairing if something happens to their original mate. If your swan has never been paired, then there is even a greater question if your swan will allow another swan on its pond.

Female swans usually will re-pair (not always, but usually) if something occurs to their initial mate. Again, if this is a swan that has never had a mate, there are no guarantees it will let another swan live on its pond.

There are also some other considerations.

If you get another swan, you must first ensure the gender of your swan so that a swan of the same gender does not get placed on your pond or you will have a fight that may result in severe injury even death to one or both of the swans.

Second, you must find out if you can have an opposite gendered swan on your pond. Many states are now killing Mute Swans so that they can introduce the larger Trumpeter Swans on ponds for Trophy Waterfowl hunting. If your swan is a Mute Swan, you may raise a red flag that gets your swan killed and removed from your pond.

The reason you have to contact your wildlife officials regarding an opposite gendered swan is that you now become a breeder as you will need to provide veterinary documentation, pinioning of the cygnets (at 1-3 weeks of age), and all other care in order to give or sell the cygnets on a yearly basis. Most swan parents will chase the cygnets from their pond at 8-10 months of age prior to the next nesting season. Swans have approximately 1-8 cygnets a year (with the exception of the Australian Black Swans which have two broods yearly), so you will need to find homes for your cygnets on a yearly basis. Hence, the need for a breeding permit.

Third, if you still decide to introduce a new swan to your pond, you must build a pen completely enclosed top to bottom (so predators cannot dig under or climb over into the pen to attack the swan). The pen must be 1/2 on land and 1/2 in the water with a zero entrance, no steep banks or abrasive substrates (rocks, gravel, etc.). A feeder should be placed inside and the new swan placed in the pen for approximately 2 weeks. This will allow the new swan to get acclimated to you, your swan, the new habitat and your feeding system. It will also allow your swan a chance for a proper introduction.

During the two week acclimation period, you should look for any signs of defensiveness from either swan. This will let you know if an eventual release onto the pond will be possible. Any signs of defensiveness, and you should consider finding the new swan a good safe home.

If no signs of defensiveness, then you can release the new swan onto the pond after 2 weeks. Again, you must be constantly aware of any signs of defensiveness on either swan's part during this release time. You must also have a rescue vehicle (boat, kayak, canoe) ready in the event of a rescue is needed. Again, you will need to find the new swan a new safe home if such defensiveness occurs. This continued defensive behavior may result in severe injury or death to one or both swans. \

We would suggest that you introduce a couple of ducks or geese onto the pond if your pond does not have other waterfowl present. If you do have other waterfowl, then the swan will do just fine with their company and you do not necessarily need to introduce another swan. The Regal Swan