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  3. Yellow-shouldered Blackbird

Birds · Passeriformes · Icteridae

Yellow-shouldered Blackbird

Agelaius xanthomus

Endangered

At very high risk of extinction in the wild in the near future.

Spotted something wrong?

The yellow-shouldered blackbird is a species of passerine bird of the family Icteridae endemic to Puerto Rico and the small islands around it. It is endangered because of the destruction of its natural habitat, brood parasitism by the shiny cowbird and the action of various predators such as mongooses and rats. It is the symbol bird of the town of Cabo Rojo.

Weight

35 g – 41 g

Size

20 cm – 23 cm

Life expectancy

13 years

Diet

Insectivore

Feeds mainly on insects and other invertebrates.

Activity

Diurnal

Active mainly during the day.

Social structure

Colony

Lives in large concentrations, often for breeding reasons.

Sighting difficulty

Hard

Estimated population

Around 1,200 individuals

RainforestOceanIslands
1countries1parks6same family

Fun facts

  • Its decline was caused by the arrival of a brood parasite: the shiny cowbird colonised Puerto Rico in the 1950s and began laying eggs in the blackbird's nests, whose chicks died after being pushed out.
  • Its recovery rests on cowbird traps and on nesting platforms set up in mangroves and on posts, an intensive management without which the species would probably already have gone.
  • The subspecies of Mona Island, an uninhabited islet between Puerto Rico and Hispaniola, survives in a separate and even smaller population.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (bird)
Habitat and environment
Mangroves, coastal dry forest and coconut groves of south-western Puerto Rico and Mona
Sexual maturity
12 months
Gestation / incubation
13 days of incubation
Litter / clutch size
3 eggs

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

Where to find it

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The pins mark the parks where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Yellow-shouldered Blackbird — same habitat, park, country, tags or family.

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Same taxonomic family
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How to help

The yellow-shouldered blackbird is classified as endangered. Organisations such as the IUCN, WWF and the Wildlife Conservation Society work specifically on its conservation and that of its habitat; looking into their programmes is a good starting point if you want to get involved.

It's documented in 1 protected area — one reason why protecting these places matters for its conservation.

Keep exploring

Based on what we already know about yellow-shouldered blackbird.

Comments

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See full glossary
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CountriesPuerto Rico
ParksGuanicaPuerto Rico
TagsInsectivore
Insectivore
Diurnal
Colonial
Endangered
Bird
Rainforest
Ocean
Islands
Puerto Rico