What behavioral cue is the most reliable indicator that an observer is seeing a Harris Hawk family group?

Answer

Observing overtly social behavior such as multiple raptors circling or hopping in tandem

If a hawk is seen engaging in social behavior, such as multiple large raptors circling, chasing, or hopping near the ground in tandem, it is almost certainly observing a Harris Hawk family group.

What behavioral cue is the most reliable indicator that an observer is seeing a Harris Hawk family group?
birdraptorclassificationharris hawkAccipiter