How did ancient Greek seers use birds, dreams, smoke, and animal entrails for divination?

In ancient Greek religion, divination was a multifaceted practice used to interpret the will of the gods. While specific methods like augury—the observation of bird flight and behavior—are often associated with Roman traditions, the Greeks utilized various techniques to seek divine guidance.12

• Dreams: Through a process known as incubation, inquirers would sleep in sacred precincts, such as the hall of Asclepius at Epidaurus, hoping to receive divine messages or cures through dreams.3
• Smoke and Entrails: Divination involving fire and smoke (pyromancy) and the examination of animal entrails (haruspicy) were practiced to discern divine intent. At sites like Olympia, priests specifically divined the will of Zeus from sacrificial offerings.13
• Oracular Consultation: Beyond these methods, the Greeks relied on oracles, where divine communication was delivered through inspired mediums like the Pythia at Delphi or through natural phenomena, such as the rustling of oak leaves at Dodona.3

These practices were essential for consulting the gods on political, military, and personal matters, reflecting a deep-seated belief that the divine communicated through signs in the natural world.13