Chisos Mountains Oak vs Clark's Grebe

Quercus tardifolia compared with Aechmophorus clarkii

Key Differences

Chisos Mountains Oak is Data Deficient while Clark's Grebe is Least Concern.

Taxonomic Classification

Rank	Chisos Mountains Oak	Clark's Grebe
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Aves (Birds)
Order	Fagales (Beeches & Oaks)	Podicipediformes (Podicipediformes)
Family	Fagaceae (Beech Family)	Podicipedidae
Genus	Quercus (Oaks)	Aechmophorus
Species	Quercus tardifolia	Aechmophorus clarkii

Conservation Status

Chisos Mountains Oak

DD — Data Deficient

Clark's Grebe

LC — Least Concern

Physical Characteristics

Attribute	Chisos Mountains Oak	Clark's Grebe
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chisos Mountains Oak

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Clark's Grebe

Habitat

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

Range

Found in Norway.

Chisos Mountains Oak

The Chisos Mountains Oak (Quercus tardifolia) is a rare deciduous oak endemic to the Chisos Mountains of Big Bend National Park in Trans-Pecos Texas, USA. Belonging to the red oak group (section Lobatae) within the family Fagaceae, it is one of the most geographically restricted oaks in North America, known from only a very small area within the high-elevation woodland zones of the park. The species grows at elevations roughly between 1,800 and 2,400 metres, where it occurs in mixed woodland communities alongside other oaks, junipers, and pines. Like other red oaks, its acorns require two years to mature, and the leaves typically display the deep sinuses and bristle-tipped lobes characteristic of the section. The IUCN currently classifies Quercus tardifolia as Data Deficient, reflecting uncertainty about its precise population size, the extent of hybridisation with related oak species, and the degree to which apparent stands represent genetically distinct individuals versus hybrids. Climate change poses a significant long-term threat to this mountain-island endemic, as rising temperatures could compress or eliminate the cooler, moister habitat on which it depends. Conservation efforts focus on accurate taxonomic assessment, population monitoring within Big Bend National Park, and seed banking to preserve genetic diversity.

Clark's Grebe

The Clark's Grebe (Aechmophorus clarkii) is a species in the genus Aechmophorus. It is currently classified as Least Concern on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.