Birda Logo
Features
Birda+
About
Species Guide
Challenges
Shop
loading...
A photo of a Wilson's Warbler (Cardellina pusilla), male
Wilson's Warbler, Male

Wilson's Warbler

Cardellina pusilla

The Wilson's Warbler (Cardellina pusilla) is a diminutive and sprightly New World warbler, characterized by its vibrant yellow underparts and olive-green upperparts. The adult male is distinguished by a striking black cap, which is either reduced or absent in the female, depending on the subspecies.

Identification Tips

When attempting to identify this species, look for the male's black crown patch and the bird's overall green and yellow plumage. The Wilson's Warbler has rounded wings and a long, slim tail. Size-wise, it ranges from 10 to 12 cm in length, with a wingspan of 14–17 cm. The western race, C. p. chryseola, is greener above and more vividly colored than the eastern, nominate race.

Habitat

Wilson's Warblers are found in fairly open woodlands with an abundance of undergrowth, shrubs, and thickets, particularly in moist areas near streams, ponds, bogs, and wet clearings.

Distribution

This species breeds across Canada and south through the western United States. During the winter months, it migrates to Mexico and continues through much of Central America. It is an exceedingly rare vagrant to western Europe.

Behaviour

Wilson's Warblers are active foragers, often seen flitting rapidly through shrubs, close to the ground, and occasionally in taller trees during the winter. They may exhibit tail twitching or wing flicking while feeding.

Song & Calls

The song of the Wilson's Warbler is a series of chattering, loud descending notes. Its call is a distinctive flat "chuff."

Breeding

Breeding begins in early March for west coast populations and can extend into August in the northern range. The female primarily constructs the cup nest, which is often hidden in moss or sedges at the base of shrubs. Clutch size ranges from 2 to 7 eggs, which are creamy or off-white with fine reddish spots. The young are altricial, hatching at 11–15 days and fledging at 8–13 days.

Similar Species

The Wilson's Warbler can be confused with the Yellow Warbler, but the latter can be differentiated by its shape, yellow wing markings, and yellow tail spots.

Diet and Feeding

Primarily an insectivore, the Wilson's Warbler feeds on insects gleaned from leaves and twigs or captured in flight. Its diet includes beetles, bees, and caterpillars, and occasionally it consumes berries.

Conservation Status

The IUCN Red List classifies the Wilson's Warbler as Least Concern. However, the chryseola subspecies has experienced a sharp decline in the 21st century due to habitat loss from development in its wintering grounds in Mexico.

Wilson's Warbler Sounds



Recorded by: © 
App logo
Birda is a birdwatching app and community aimed at curious people who want to deepen their connection with nature.

Wilson's Warblers on Birda

Photos
Sightings

More New World Warblers

Birda Logo

Your birdwatching journey like never before

Connect with nature in minutes
Take a walk, look out of the window and log the birds that you see. Feel good about those little connections to nature.
Discover the joy of birding
Find new birding spots, see more birds, share and celebrate with a like-minded community of nature lovers.
Play your part in saving nature
Logging your birding sightings and sessions turns into positive action for our planet. Every sighting counts.

Birda Blog

What Our Birders Say
Trevarthen1
Birda fan
I really enjoy using Birda, all sightings are recorded and photos can be added. There are monthly challenges which help to get you out to record your sightings. The Birda community are great and are happy to help with unidentified bird sightings. Suitable for all ages and experience!
Chudbond
Love Birda
I love this app. It really encourages you to log your sightings and the community is friendly and helpful.
Leonie
We've been waiting for an App like this
Excellent! We've been waiting for an app like this! Thank you! It would be nice if you could assign additional birds to sessions later!
David C
Very knowledgeable group
Nice friendly birding community. Very knowledgeable group with a willingness to help.
Safira V
Birding and wellbeing app
Birda is an excellent platform to share your love of Birding and is a great tool of encouragement for a Birding Beginner like me. Birda has a very kind and supportive community of Birding enthusiasts. For me BIRDA is not only a BIRDING but also a WELLBEING App.
Alice J
Awesome Birding Community
I absolutely love the community aspect of this app. The app is so user friendly and has fun interactive challenges to get you out birding. I’ve tried others but since I’ve started using Birda I’ve not gone back!
Birdafan
Ideal Birdwatch Companion
Simply adds to the enjoyment of my birdwatching and helps me record what I’ve seen.
Robred 2
Fun way to add to your birdwatching experience
I enjoy watching birds in my backyard, but this app helped me really pay attention while on vacation this summer. It was fun to add new birds to my bird watching app.
Unbridled Discoveries
Great app for bird lovers
I love this app! It’s a wonderful way to track birding sessions, and also connect you with fellow birders. I also really like the unidentified bird section, it’s a great community tool to help figure out what a never-before-seen bird is!
BCHphotography_
Such a great app!
I didn’t think I could enjoy birding more but this app makes it so much better. Some great features and a really great way to share your sightings with your friends or fellow birders nearby or around the world! ❤️
As featured in
Birda Logo
AboutPressAmbassadorsAffiliatesInfluencersCareersPrivacyTerms & Conditions
An app for birdwatchers
Connect with us
Copyright © 2024 Chirp Birding. All rights reserved.