Lesser snow goose populations have grown so dramatically that their overgrazing is destroying Arctic and subarctic marsh habitats, creating welfare concerns for the geese themselves and thousands of co-dependent species.
Snow goose hyperabundance creates a paradox: the welfare of individual geese is linked to a population level that is destroying the ecosystem supporting them. Overcrowded nesting conditions with degraded food resources lead to poor chick survival, nutritional stress, and disease. The habitat destruction creates a feedback loop — growing populations degrade the habitat they depend on, eventually causing population-level welfare collapse. Lethal population management — through extended hunting seasons — is contested but may prevent a larger future welfare crisis of mass starvation when carrying capacity fails. This case illustrates how individual animal welfare and ecosystem health sometimes require difficult trade-offs.