Streak-Breasted Bulbul
Also known as: Hypsipetes siquijorensis (scientific name) · Siquijor bulbul
Definition
The Streak-Breasted Bulbul (Hypsipetes siquijorensis) is a songbird of the bulbul family Pycnonotidae endemic to the Philippines, where it is now essentially confined to the island of Siquijor. A drab, streaked bird of forest and taller second growth, it is notable less for its plumage than for its perilous situation: deforestation on its small home island has squeezed the species into limited habitat fragments, making it one of the most range-restricted birds in the country. (Wikipedia)
Identities
| Source Type | Identity |
|---|---|
| Wikipedia | Streak-breasted bulbul |
| Wikidata | Q1304779 |
| DBpedia | N/A |
| ProductOntology | N/A |
| Wiktionary | N/A |
| Library of Congress Subject Headings (LCSH) | N/A |
| MeSH | N/A |
| NCBI Taxonomy | Hypsipetes siquijorensis |
| AGROVOC | N/A |
| Google Scholar | Hypsipetes siquijorensis streak-breasted bulbul Siquijor endemic conservation |
| ConceptNet | bird |
| OpenCyc | N/A |
Also Known As
- Hypsipetes siquijorensis (scientific name)
- Siquijor bulbul
Examples and Analogies
- An Island’s Whole Portfolio in One Stock: Because the species effectively holds all its assets on a single small island, one severe typhoon season or wave of land clearing can crash the entire population, unlike wide-ranging bulbuls that can rebound elsewhere.
- The Plain Bird with the Precious Address: Among the colorful endemics that draw birders to the Philippines, this unassuming brown-streaked bulbul is sought precisely because it exists nowhere but Siquijor.
Usage Scenarios
1. Single-Island Endemism Case Study
Biology educators use the species to illustrate island endemism and genetic vulnerability in Philippine biodiversity courses.
2. Target of Forest Restoration
Reforestation programs on Siquijor prioritize native tree species that restore bulbul habitat, using the bird as a measurable recovery indicator.
Strategies
- Survey remaining forest patches on Siquijor regularly to track population size and trend.
- Enrich second growth with native fruiting trees to expand usable habitat beyond primary forest fragments.
- Engage Siquijor municipalities in localized protection, since the species’ fate depends entirely on one province’s land-use decisions.
Security and Safety Measures
- Protected under Republic Act No. 9147, which prohibits capture and trade of wild songbirds.
- Cage-bird trade vigilance matters especially for island endemics with small populations.
- Ecotour visits to its habitat should be guided and small-scale to limit disturbance.
Historical Context
The species was described from Siquijor specimens in the nineteenth century, part of the wave of island-by-island collecting that mapped Philippine biodiversity. Former populations on neighboring islands have disappeared or been reevaluated, leaving Siquijor as the species’ stronghold. As Siquijor’s forests were cleared for coconut and farming through the twentieth century, the bulbul retreated to scattered woodlots and gullies, and late twentieth-century surveys found it scarce.
Challenges and Controversies
Tiny Range and Small Population
Conservationists debate whether the species’ population is stable at low numbers or still declining, complicated by infrequent systematic surveys on Siquijor.
Habitat Versus Livelihood
Forest protection on a small, densely farmed island requires balancing community livelihood needs, making strict-reserve approaches politically difficult.
Related Topic
Siquijor Province