Question

There was a of bees in my garden​

Answer 1

Answer:

Warm spring and summer temperatures and the lure of sweet nectar bring the active bees out to gather food. Bee colonies form over time and honeybee swarm nesting may be in a tree, under your eaves or even your attic. This close proximity to a large number of stinging insects can pose a problem.

Answer 2

Answer:

There was a beehive of bees in my garden or

in collective noun there was a hive of bees in my garden