Songbird populations across North America and Europe have declined by billions of individuals since 1970, representing one of the most significant wildlife welfare crises of our era.
The suffering associated with songbird population decline occurs both at the population level through loss of ecological function, and at the individual level through causes of death including predation, window strikes, and starvation during habitat degradation. Cats cause particular welfare concerns because predation is often non-lethal initially, leaving birds injured, stressed, and in prolonged states of distress before death. Window strikes cause traumatic brain injury and often delayed death. Climate change is altering the phenological timing of insect emergence relative to chick hatching, causing malnutrition in nestlings when insect peaks no longer coincide with peak food demand. Individual welfare interventions like window film treatment and cat management complement broader conservation efforts.