What key physical feature is noted as lacking on the Eastern Phoebe compared to many Tyrannidae family members?

Answer

A prominent eye-ring or strong wingbars.

The absence of a prominent eye-ring or strong wingbars is a key feature that helps birders separate the Eastern Phoebe from similar-looking species within the Tyrannidae family.

What key physical feature is noted as lacking on the Eastern Phoebe compared to many Tyrannidae family members?
raritybirdPhoebe