Determining stats based on "activity"

#1
All,

I have a data set that I am looking at determining "activity" associated with bird observations. I have a bunch of raw data consisting of date, time, and bird type.

For instance:
5/25/2022 0901 Robin
5/25/2022 0901 Cardinal
5/25/2022 0903 Bluejay
5/25/2022 0905 Robin
5/25/2022 1000 Chickadee

The data set has a few thousand entries. I'm struggling with a statistic that would define activity. I suspect activity is highest around dawn and dusk, but there could be correlations to moon phases, weather patterns, etc that I can eventually tie to this database. Is there any easy method for plotting or determining "activity" for a given data set at a specific period?