Ruby-crowned Kinglet

Look for

A tiny, hyperactive, olive-gray bird with white eye-ring, two white wing bars, and — on males — a hidden ruby crown patch that flares only when they're excited or displaying. Most of the time the red is completely hidden.

Size: ~4.25" — one of the smallest birds in Memphis, smaller than some hummingbirds.

Listen for

• Call: a sharp, dry "di-dit!" — low, scolding, almost insect-like.
• Song: a long, loud series — "zee-zee-zee...you-you-you...LIBERTY-LIBERTY-LIBERTY" — incredibly loud for such a small bird. (Usually heard as birds fuel up before migration.)

Where in Memphis

Every wooded habitat with shrubs — woodlands, overgrown edges, suburban gardens. Often joins mixed winter flocks with chickadees, titmice, Downy Woodpeckers, and nuthatches.

Behavior

• Never stops moving. Flits constantly, nervously flicks wings, hovers briefly. Hard to see because they're always in motion.
• Hovers to pluck insects off leaf undersides.
• Eats spiders and their egg cases — a major overlooked food source in winter.
• Crown flash is used in territorial displays against other males.

Story

The disappearing crown

The ruby crown is almost never visible in normal life. Memphis birders can see a Ruby-crowned Kinglet a hundred times and never see the red — it only flares during aggressive displays or extreme excitement. Finding one with crown raised is a birder's small lifetime achievement.

Tiny migrants, long distances

These 6-gram birds breed in the boreal forest of Canada and Alaska, then migrate south to Memphis for the winter — a journey of 1,500–3,000 miles on a body lighter than a nickel.

The winter woodland soundtrack

That dry "di-dit!" call is the winter woodland soundtrack in Memphis. If you walk through Overton's Old Forest in January, you're hearing it constantly, coming from shrubs and low branches all around you.

Fun facts

• Their scientific name calendula means "little calendar" — a reference to their regular migration timing.
• They build tiny hanging cup nests with moss and spider silk, held together almost entirely by elasticity.
• A female can lay 12 eggs in a single clutch — proportionally enormous: up to 1.5x her own weight.
• Oldest known wild Ruby-crowned Kinglet: 5+ years (tiny birds, short lives).