カンムリハシリチメドリ (Chirruping Wedgebill)

The Chirruping Wedgebill (Psophodes cristatus) is a distinctive Australian passerine belonging to the family Psophodidae. This medium-sized, ground-dwelling bird inhabits the arid and semi-arid shrublands of inland Australia, particularly mulga (Acacia aneura) woodland and spinifex grasslands in Queensland, New South Wales, and South Australia. The wedgebill is named for its laterally compressed, wedge-shaped bill, which is well adapted for processing the hard seeds and invertebrates that form its diet. Its plumage is predominantly sandy brown above with paler underparts, providing excellent camouflage in the red-earthed Australian interior. The chirruping wedgebill is renowned for its far-carrying, repetitive calls — a series of ascending or descending notes that echo across the sparse desert vegetation — and different populations have been documented producing distinct song dialects. Two species of wedgebill exist in Australia, and they are most easily separated by their calls rather than appearance. Breeding occurs during periods of rainfall when invertebrate and seed availability peaks; nests are cup-shaped structures concealed in low shrubs. The species is classified as Least Concern by the IUCN, with its population considered stable across its extensive range. It is a characteristic and ecologically important component of Australian arid-zone bird communities.