Crested ibis confirmed beyond 300 km from Sado, a first for Shiga

A Japanese crested ibis living in the wild has been confirmed in Shiga Prefecture, more than 300 km from Sado Island.

This is a first confirmed occurrence since the 2008 releases, not a tracked flight route or proof of settlement.

Summer observations, October announcement

Japan’s environment ministry announced on 9 October that one ibis had been observed in Tsuruga, Fukui, and Takashima, Shiga. The Tsuruga sighting was on 5 May; Takashima observations were made on 18 June and several days in August. ANN reported the announcement on 10 October. The news concerns the disclosure of earlier observations, not an arrival first recorded this week.

What the distance establishes

The ministry describes this as the first confirmed dispersal beyond 300 km from Sado and the first Shiga occurrence since reintroduction began in 2008. The figure is distance from the island, not the length of a continuously tracked flight. Feeding in fields and water channels farther away helps assess dispersal possibilities. It does not establish a new breeding population.

Identity remains an inference

The bird had no numbered leg ring. From the locations and timing, the ministry considers the sightings to involve the same individual born in the wild on Sado. Its identity, age and sex are unconfirmed. About 6,500 mainland sighting reports received over the years are reports, not a count of 6,500 individual birds; repeated observations can contribute to the record.

Watching can change the outcome

The ministry says visitors seeking photographs caused parking and tripod problems, and observation pressure drove the bird away. It asks people to keep their distance and avoid sharing information that identifies its location online. Future sightings and evidence of establishment on the mainland are the next things to follow. Reports should go through official channels, with the observation rules read alongside the announcement.

Primary source and independent checks

Primary source and official explanation: 環境省・関東環境局

Primary source and official explanation: 環境省・トキ

Independent reporting check: ANN / 名古屋テレビ

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