When would the carrying capacity for Bohemian waxwings living in a tall coniferous forest decrease MOST significantly?

The carrying capacity for Bohemian waxwings in a tall coniferous forest would decrease most significantly during winter months when food sources, such as berries and insects, are scarce. Additionally, if there were a harsh winter with extreme cold or heavy snowfall, it could further limit food availability and increase mortality rates. Habitat loss or degradation, as well as increased predation or competition, could also contribute to a decline in carrying capacity during this time.