1. It’s an adverb which means: ” by the the most direct route.”
2. Whereas beeline is a noun which means: “the most direct route.”
3. Collective noun for bees: colony
Collective nouns for crows:
A horde of crows
A hover of crows
A flock of crows
A parliament of crows
A murder of crows
A storytelling of crows
A pack of crows
A mob of crows
A muster of crows
Source: BirdSpot, Google and vocabulary.com
Dancing light of grace 