Birds · Passeriformes · Maluridae

Superb Fairywren

Malurus cyaneus

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk. See full glossary

The superb fairywren — known in Spanish as malurus superbo or ratona azul — is a tiny bird, very common in the gardens of south-eastern Australia. The breeding male in season wears a dazzling cobalt and turquoise blue with a black mask; the rest of the year he turns brown like the females. It lives in family groups with cooperative breeding. Its mating system has made it one of the most studied birds in the world in reproductive biology.

Weight

8 g – 13 g

Size

13 cm – 14 cm

Lifespan

10 years

Diet

Insectivore

Feeds mainly on insects and other invertebrates.

Activity

Diurnal

Active mainly during the day.

Social structure

Family group

Lives in small family groups with close bonds.

Sighting difficulty

Easy

Fun facts

  • It is socially monogamous and sexually promiscuous to an extreme degree: as many as three quarters of the chicks in a nest may be fathered by males from outside the group, one of the highest proportions documented in any bird.
  • The males court carrying a yellow or pink petal in the bill, contrasting with their blue plumage, and present it to females from other groups.
  • The female sings to the eggs before they hatch and teaches them a password note: the chicks that reproduce it when begging get fed, and parasitic chicks that fail to learn it end up rejected.

Life cycle & biology

Skeleton type
Vertebrate - internal bony skeleton (bird)
Habitat & environment
Dense scrub, understorey, hedgerows and gardens of south-eastern Australia and Tasmania
Birth weight
Altricial: born blind, naked or with sparse down and entirely dependent
Size at birth
Altricial: born blind, naked or with sparse down and entirely dependent
Sexual maturity
12 months
Gestation / incubation
14 days of incubation
Litter / clutch size
3 eggs

Sources consulted: https://es.wikipedia.org/wiki/Malurus_cyaneus

Best time: All year in south-eastern Australia, by day; the male wears his blue breeding plumage mainly between September and January.

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