A photo of a Crimson Sunbird (Aethopyga siparaja), male
Crimson Sunbird, Male

Crimson Sunbird

Aethopyga siparaja

The Crimson Sunbird, Aethopyga siparaja, is a diminutive yet striking bird, measuring a mere 11 cm in length. The adult male is resplendent with a crimson breast and a maroon back, set off by black malar stripes. A vibrant yellow rump and olive belly complete its palette. The female, in contrast, sports an olive-green back and a yellowish breast, with white tips adorning the outer tail feathers.

Identification Tips

To identify the Crimson Sunbird, look for the male's distinctive coloration—crimson and maroon with a yellow rump. Females are more subdued in color but can be recognized by their olive-green back. The species is characterized by medium-length, thin, down-curved bills and brush-tipped tubular tongues, specialized for nectar feeding. In most of their range, males boast a long green-blue tail, though some regional variations exist.

Habitat

This species is known to inhabit both forests and cultivated areas, demonstrating a degree of adaptability to human-altered landscapes.

Distribution

The Crimson Sunbird is a resident breeder across tropical southern Asia, with its range extending from India and Nepal through Bangladesh and Myanmar to Indonesia and Brunei.

Behaviour

These sunbirds exhibit fast and direct flight on their short wings. While they are capable of hovering like hummingbirds to take nectar, they more commonly perch to feed. They are also known to consume insects, particularly when provisioning their young.

Song & Calls

The call of the Crimson Sunbird is a distinctive "chee-cheewee," a sound that once heard, is not easily forgotten.

Breeding

The Crimson Sunbird lays two or three eggs in a nest that is suspended within a tree, a testament to their architectural ingenuity.

Similar Species

While the Crimson Sunbird is unique in its coloration, it may be confused with other sunbird species. However, the long green-blue tail of the male is a helpful distinguishing feature.

Diet and Feeding

Primarily nectar feeders, Crimson Sunbirds have evolved bills and tongues ideally suited for this diet. They do, however, supplement their diet with insects, a necessary protein source during the breeding season.

Conservation status

The Crimson Sunbird is currently classified as Least Concern by the IUCN, indicating a stable population without immediate threats to its survival.

App logo
Birda is a birdwatching app and community aimed at curious people who want to deepen their connection with nature.
Download Birda on the Apple App StoreDownload Birda on the Google Play Store

Distribution of the Crimson Sunbird

Crimson Sunbird Fun Facts

Did you know?
The Crimson Sunbird is the national bird of Singapore

Crimson Sunbirds on Birda

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.
What Our Birders Say
Pdydhdrexgi
Fantastic App
This is a really lovely app, for everyone interested in birds - from newbies to old hands. There is a very friendly feel to the community and you will genuinely learn a lot as you record your sightings and photos. There are lots of badges and competitions to keep you engaged, and a host of really useful features.
Emma L
App got me interested in birding!
Super friendly community <3 This app got me interested in birding! It teaches me cool stuff and its super friendly, and fun :) The species guide is really developing my knowledge, and i love seeing cool new birds from round the world!
Paul F
Very good database
Highly recommend. It great that this app shows you male Vs female variations when posting. Very good database I'm really impressed.
D3Nature
Great app for learning Birds
I’ve been using the app for a couple of months and love it....Someone said it’s like a real life Pokémon Go for birds. They’re not far off! It’s something that the family can do that gets you out and about. Well worth downloading no matter your age.
Erna M
I really like Birda
I really like Birda. I also use other birding apps and have Birda with E-bird going at the same time.
Sacha0508
Simply fantastic
I love this app, it puts so much fun into recording the birds I’ve seen and heard while I’m out and about. The interface is user-friendly and suitable for all ages. It’s great to collect badges and to review my “lists”.
Bryan C
Clean and easy to use
Really enjoying this app, it's clean and easy to use. I love the ease of being able to add those one-off birds without starting a whole checklist. I also like the social aspect, like the parts of my Facebook I like, without the ads and junk, just birds. Can't wait to see it become more populated.
EandB17
Terrific App for Birders
Downloaded Birda around the time my interest in birding was sparked, and it has been a terrific app to help me (1) share my experience, (2) document my sightings, and (3) learn more about birds in general. That said, I also believe Birda is a fantastic app for birders of all experience levels. Great community!
Marlster24
Recommend for any bird watcher
Very wholesome app: I joined this app with a new interest in watching birds to help me find out what I was spotting. The community is very active in helping identify birds which is great and everyone is very kind so it’s just a nice wholesome community. I would definitely recommend this for any bird spotter 😃
SuperOliviaGirl
Really great app
It’s easy to use and it’s fun to log the birds you notice on a walk or just in your garden. There’s a option to record the birds you see in a session which is really nice. Good excuse to stop for a while and just watch birds. I am also enjoying the information part where you can find out fact about birds from all over the world.
As featured in
BBC RadioABC NewsFox NewsForbesTimeoutAndroid CentralBirdWatching DailyPetapixel
Birda
Install now for free
Get app
Get the Birda app on your phone to easily identify birds on the go