Black Swallow flock in dreams
A turning cloud of small birds — collective movement that looks like a single mind.
How black changes the reading
Black colour pulls the symbol toward the not-yet-known — depth, hiddenness, the part of the situation that has not yet come into the light. The dream is rarely warning you; it is showing you that there is more to the picture than the part you have been looking at.
The base reading of Swallow flock
A flock of swallows in a dream is the dream's image of group movement so fast it stops looking like a group. Swallows turn together; the flock behaves like one body. The dream brings them when something in your life — a mood, an opinion, a wave of action — is moving through people as if it were a single thought. A flock you are inside is the dream noting that you have stopped tracking which decisions are yours and which are the group's. A flock you are watching from below is the dream saying you are still your own bird, and the rest is weather.