 | Increase of 11% per year
in Quebec due to human food sources
|
| Invasive effect
 | Competes for food
|
| Competes with common tern for nesting habitat
|
| Can predate bird eggs & chicks
|
| Droppings decrease vegetation
|
|
| Management
| Monitor common tern population for decrease
|
| Institute control program if terns in trouble
|
|
