Ruby-crowned Kinglet

What it is

The ruby-crowned kinglet (Corthylio calendula) is a very small passerine bird found throughout North America. It is a member of the kinglet family. The bird has olive-green plumage with two white wing bars and a white eye-ring. Males have a red crown patch, which is usually concealed. The sexes are identical (apart from the crown), and juveniles are similar in plumage to adults. It is one of the smallest songbirds in North America. The ruby-crowned kinglet...

Where and when to find it

Habitat

You can find Ruby-crowned Kinglets in forests, woodlands, and even parks across almost all of the United States, especially during migration.

How to find it

Look for a very active, tiny bird constantly flicking its wings. Listen for its surprisingly loud and musical song. The male's red crown is often hidden.

Best time of day

Spring and fall during migration; listen for their songs in the morning.

How it lives

What it eats

Tiny insects and spiders, sometimes berries.

What eats it

Hawks, owls, larger birds, small mammals.

Worth knowing

• It is one of the smallest birds in North America.
• Males only show their ruby crown when they are excited or trying to impress a female.
• Despite its small size, it has a surprisingly loud and complex song.
• Its scientific name means 'little king' because of its crown.
• They can hover like a hummingbird to snatch insects off leaves.
• These tiny birds can migrate thousands of miles between their breeding and wintering grounds.

Why it matters

Ruby-crowned Kinglets eat lots of tiny insects, helping to control insect populations. They are an important food source for larger animals.