Learn how to tell the difference between Rufous and Ruby-throated Hummingbirds by exploring these resources.
Rufous and Ruby-Throated: Identifying Two Hummingbird Species
Identification of Ruby-throated Hummingbirds
Field Markings to Distinguish Males from Females and Adults from Juveniles
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Exploring Together: Identifying Ruby-throated and Rufous Hummingbirds