A bluebird at its nest hole in an apple tree.

A bluebird at its nest hole in an apple tree on the Jenning's place.

Young Sierra hermit thrush chicks in their nest near Paradise River in Mount Rainier National Park.

A Sierra hermit thrush and three young chicks in their nest in Mount Rainier National Park.

A Sierra hermit thrush and three young chicks in their nest in Mount Rainier National Park.

A Sierra hermit thrush and three young chicks in their nest in Mount Rainier National Park.

Phoebe Katherine Finley posing with a bluebird perched on the palm of her hand. Image note: used as an illustration in the 1915 book, Little Bird Blue.

William Finley Jr. posing with a bluebird perched on his shoulder. Image note: used as an illustration in the 1915 book, Little Bird Blue.

William Finley Jr. posing with a bluebird perched on his hand. Image note: used as an illustration in the 1915 book, Little Bird Blue.

William Finley Jr. posing with a bluebird perched on the palm of his hand. Image note: used as an illustration in the 1915 book, Little Bird Blue.