Asian Openbill vs Common Button Lichen

Anastomus oscitans compared with Buellia erubescens

Key Differences

Asian Openbill is Least Concern while Common Button Lichen is Not Evaluated.

Taxonomic Classification

Rank	Asian Openbill	Common Button Lichen
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Aves (Birds)	Lecanoromycetes (Lecanoromycetes)
Order	Ciconiiformes (Ciconiiformes)	Caliciales (Caliciales)
Family	Ciconiidae	Caliciaceae
Genus	Anastomus	Buellia
Species	Anastomus oscitans	Buellia erubescens

Conservation Status

Asian Openbill

LC — Least Concern

Common Button Lichen

NE — Not Evaluated

Physical Characteristics

Attribute	Asian Openbill	Common Button Lichen
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Asian Openbill

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found in Norway.

Common Button Lichen

Habitat

Native to Asia and Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway, Portugal, Sweden, Taiwan, and United States.

Asian Openbill

The Asian Openbill (Anastomus oscitans) is a species in the genus Anastomus. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments. Found in Norway.

Common Button Lichen

<em>Buellia erubescens</em>, commonly known as the common button lichen, is a lichen species with documented occurrences across Asia, Europe, and North America, including countries such as Norway, Portugal, Sweden, Taiwan, and the United States. It typically colonizes diverse terrestrial surfaces, often found on bark, rock, or other substrates in temperate and boreal environments. Common button lichen belongs to the genus <em>Buellia</em> within the family Caliciaceae. As a crustose lichen, it typically forms tightly adhered, crust-like thalli on the surfaces it colonizes, making it characteristic of stable, undisturbed substrates. Biological traits such as average lifespan, thallus size, and biomass of this species remain poorly documented in the scientific literature. The species has not yet been formally evaluated by the IUCN, and its global conservation status therefore remains undetermined. Its occurrence across multiple continents suggests a wide ecological tolerance, though detailed population data and trend assessments are currently lacking for this taxon.