Taxonomy
- Kingdom: Animalia
- Phylum: Arthropoda
- Class: Insecta
- Order: Lepidoptera
- Family: Coleophoridae
- Genus: Coleophora
- Species: C. serratella
Common name
- Common case-bearer
Description
Coleophora serratella is a small moth with a wingspan ranging from 10 to 14 mm. The forewings are narrow, elongated, and typically brownish to ochreous with subtle longitudinal streaks. The hindwings are narrow, lanceolate, and possess long fringes. Adults are nocturnal and are attracted to light sources.
Distribution
The species is widely distributed across much of Europe, extending from the British Isles through central and northern Europe to the Baltic states. Its range also includes parts of western Asia. Records confirm its presence in habitats such as woodland edges, hedgerows, and areas where host plants occur.
Life cycle and ecology
- Egg: Laid singly on suitable host plants during late summer.
- Larva: The larval stage constructs a portable silken case that incorporates fragments of leaf material. The case is roughly 5–8 mm in length, tubular, and often exhibits a characteristic serrated or toothed opening—hence the species epithet “serratella.” Larvae feed on the foliage of various deciduous trees, most notably species of birch (Betula), alder (Alnus), and willow (Salix).
- Pupa: Pupation occurs within the larval case attached to the host plant or nearby substrate.
- Adult: Emergence typically occurs from May to July, depending on geographic location and climate. Adults have a short lifespan, primarily focused on reproduction.
Host plants
Documented larval host plants include:
- Birch (Betula pendula, Betula pubescens)
- Alder (Alnus glutinosa)
- Willow (Salix spp.)
- Poplar (Populus spp.)
Economic and ecological significance
The species is generally considered not to be a major pest. However, localized defoliation of host trees may occur when larval populations reach high density. Its presence can serve as an indicator of healthy deciduous woodland ecosystems.
Conservation status
Coleophora serratella is not listed on major threatened species lists (e.g., IUCN Red List) and is regarded as a species of least concern throughout its range. Populations are stable in most regions, with no widespread threats identified.
Research notes
- The species has been used in studies of lepidopteran case-building behavior and host‑plant specialization.
- Molecular analyses placing C. serratella within the phylogeny of Coleophoridae corroborate its classification based on morphological characters.
References
(Information compiled from standard lepidopteran reference works, regional faunal surveys, and peer‑reviewed entomological literature. Specific citations omitted for brevity.)
