Abert's Squirrel vs Common Spangle Gall

Sciurus aberti compared with Neuroterus quercusbaccarum

Key Differences

• Abert's Squirrel is Least Concern while Common Spangle Gall is Not Evaluated.

Taxonomic Classification

Rank	Abert's Squirrel	Common Spangle Gall
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum	Chordata (脊索动物门)	Arthropoda (节肢动物门)
Class	Mammalia (哺乳動物)	Insecta (昆蟲綱)
Order	Rodentia (啮齿目)	Hymenoptera (膜翅目)
Family	Sciuridae (Squirrels)	Cynipidae
Genus	Sciurus (Tree Squirrels)	Neuroterus
Species	Sciurus aberti	Neuroterus quercusbaccarum

Evolutionary Relationship

Abert's Squirrel and Common Spangle Gall share a common ancestor at the Kingdom level: Animalia. (动物界)

Conservation Status

Abert's Squirrel

LC — Least Concern

Common Spangle Gall

NE — Not Evaluated

Physical Characteristics

Attribute	Abert's Squirrel	Common Spangle Gall
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Abert's Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Common Spangle Gall

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Abert's Squirrel

The Abert's Squirrel (Sciurus aberti) is a species in the genus Sciurus. It is currently classified as Least Concern on the IUCN Red List. It typically inhabits diverse terrestrial and aquatic ecosystems.

Common Spangle Gall

<em>Neuroterus quercusbaccarum</em>, commonly known as the common spangle gall, is a small gall wasp in the family Cynipidae, closely associated with oaks in Europe and western Asia. This species is notable for its complex life cycle involving alternating sexual and asexual generations, each producing morphologically distinct galls on its oak hosts. The asexual generation typically induces flat, disc-shaped "spangle" galls on the undersides of oak leaves, while the sexual generation produces small "currant" galls on oak catkins and leaves in spring. <em>Neuroterus quercusbaccarum</em> is widely distributed across Europe, extending into parts of western Asia and North Africa wherever suitable oak hosts, particularly <em>Quercus robur</em> and <em>Quercus petraea</em>, occur. The species has not been evaluated under IUCN Red List criteria, and population trends are not formally monitored, though it remains common across much of its range. Biological traits such as average lifespan in years, body dimensions, and weight remain poorly documented in the scientific literature for this minute insect. The larvae develop entirely within gall tissue, feeding on plant nutrients provided by the gall structure they induce. Adult wasps are free-living and do not feed substantially. Conservation status is listed as Not Evaluated.