There are only 4 possibilities.
1. The eggs were infertile and the swans left the area.
2. The eggs hatched and the parents moved the family away from the nest to avoid potential predators.
3. A predator attacked the nest, scaring the parents away. The predator then took the eggs.
4. Depending on which state you live and that you are in the U.S., state and federal wildlife officials have been killing adult swans and cygnets, destroying eggs and nests for the past 20 years. At extensive expense to taxpayers, this program has been carried out through lies to the taxpayer stating Mute Swans are non-native ( ancestral fossils have been found in North America),the swans are invasive and detrimental to the environment and other wildlife (current and past studies that are readily ignored by wildlife officials show that the presence of Mute Swans increase the biodiversity of their habitat, that the swans are Sentinel species indicating the presence of heavy metals such as lead and harmful microorganisms) and various other misrepresentations.
Wildlife officials have been killing the Mute Swans because they are trying to open the swans’ habitat to introduce the larger Trumpeter Swans into areas they have never before inhabited. The purpose is to use the Trumpeter Swans for Trophy Waterfowl hunting. Wildlife officials have denied this, yet specifically allowed the first hunting of Trumpeters to indigenous people in Minnesota in 2015, thus opening the pathway for general public hunting.
Essentially, wildlife officials are killing an entire species (Mute Swans) to introduce another species (Trumpeter Swans) for Trophy Waterfowl hunting.
All of this mess began in 2004 when a federal court ruled that wildlife officials had used “junk science” to kill the Mute Swans. The court ruled that the swans were protected under the Migratory Bird Treaty Act (MBTA) of 1918. In 1992, President Clinton ratified a change to the Treaty by declaring no swan except the Tundra Swan could be hunted by indigenous people of Alaska.
Due to the 2004 court case, several unscrupulous congressman changed the protection of the Mute Swans by passing a bill on the last day of Congress in an Omnibus Budget Bill. Congress passed the Appropriations bill with the Mute Swan and other birds removed from protection of the MBTA and called this the 2004 MBTA Reform Act.
This was done illegally because it is only the Foreign Relations Committee of the Senate and the President that can change a Treaty. All of this is to say that the U.S. taxpayer has been funding a bogus law since 2004 because it was never ratified. Furthermore, U.S. and state wildlife officials have been violating the Treaty since 2004 by killing Mute Swans and allowing the hunting of swans, specifically Tundra Swans throughout the U.S.
Unfortunately, the same wildlife officials responsible for these violations for the past 20 years are still employed at the state and federal level. The only way to correct this issue is to have these individuals removed from these agencies. Only state governors can remove state wildlife officials and the President’s appointed officials remove them at the federal level. The major issue is that most of these positions are at government pay grades and prevent the firing. It is therefore, going to be up to the taxpayers to demand the killing of Mute Swans stop through their elected officials. We hope this information is of benefit. The Regal Swan