Here's why:
* Flocking Behavior: They often form large flocks, sometimes numbering in the hundreds, for feeding and roosting.
* Breeding Season: While they pair up during the breeding season, they still maintain close proximity to other goldfinches.
* Communication: Goldfinches communicate with each other using a variety of calls and songs, which helps them stay connected within the flock.
However, there are some instances where goldfinches might appear more solitary:
* During nesting: While they are raising their young, they are more focused on their nest and territory.
Overall, goldfinches are considered social birds, but their level of sociability can vary depending on the time of year and their specific activity.