- Swans usually mate for life, but if one member of the pair dies, the remaining swan will remate.
- Trumpeters are one of the first waterfowl species to arrive on the breeding grounds, often returning before wetlands are ice-free.
- Egg laying usually begins in late April in the Midwest. Only the female incubates the eggs.
- The female cares for the young for about 24 hours after hatching before leaving the nest. Young are usually flightless until mid-September.
- Average brood size is between 4-6.
