Rufous Hornbill

Also known as: Kalaw · Philippine rufous hornbill

Definition

The rufous hornbill (Buceros hydrocorax), widely known in the Philippines as the kalaw, is the largest hornbill species endemic to the Philippines, inhabiting mature forests on Luzon and Mindanao and nearby islands. Males show rich rufous head, neck, and underparts against black wings, while females are predominantly darker; the species’ booming calls are a signature sound of old-growth Philippine lowland forest, and habitat loss has made its populations decline across its range. (Wikipedia)

Identities

Source Type	Identity
Wikipedia	Rufous hornbill
Wikidata	Q1085327
DBpedia	N/A
ProductOntology	N/A
Wiktionary	N/A
Library of Congress Subject Headings (LCSH)	N/A
MeSH	N/A
NCBI Taxonomy	Buceros hydrocorax
AGROVOC	N/A
Google Scholar	Buceros hydrocorax rufous hornbill kalaw Philippine endemic forest conservation
ConceptNet	N/A
OpenCyc	N/A

Also Known As

Kalaw
Philippine rufous hornbill

Examples and Analogies

Gardener of the canopy: Like its Visayan relative the tarictic, the kalaw swallows and disperses the fruits of figs and laurels across large tracts, acting as a keystone seed-disperser of Philippine forests.
Rainforest trumpet: Its far-carrying calls play the auditory role in Luzon and Mindanao forests that gibbons’ songs play elsewhere in Southeast Asia — an acoustic marker of intact wilderness.

Usage Scenarios

1. Flagship Species Programs

Conservation NGOs on Luzon and Mindanao use the kalaw as a flagship to rally protection of remaining lowland dipterocarp forests.

2. Birdwatching Ecotourism

Guided forest walks in sites like the Sierra Madre target noisy kalaw flocks as a highlight for visiting birders.

Strategies

Conserve large, connected forest blocks; hornbills with big home ranges disappear from small, isolated patches first.
Engage indigenous forest communities as monitoring partners, as their territories often hold the last strongholds.

Security and Safety Measures

Hunting and possession of the species are prohibited under Republic Act 9147, with penalties for violators.
Report trapping or shooting of hornbills to DENR; even “one bird” poaching compounds already-declining populations.

Historical Context

The kalaw entered Western science through specimens collected during the Spanish-era natural-history expeditions of the nineteenth century, and its imposing form later earned it informal billing as the “clock bird” or “farmers’ clock” in rural folklore tied to its regular calling times. Ornithologists subsequently recognized distinct northern and southern forms on Luzon and Mindanao, sometimes treated as separate species. A century of logging reduced the old-growth lowland forests on which it depends, and the species is now treated as a conservation concern throughout its range. (Wikipedia)

Challenges and Controversies

Taxonomic Split Debate

Whether the Luzon and Mindanao populations constitute one species or two affects its assessed extinction risk and conservation priority.

Hunting and Trapping

Beyond habitat loss, some birds are still taken for food and the pet trade in remote areas despite legal protection.

References

Rufous hornbill