Tarache delecta

(Walker, 1858)

Delightful Bird-dropping Moth, Mallow Caterpillar (larval stage)

Tarache delecta, commonly known as the delightful bird-dropping , is a noctuid moth in the Acontiinae. The was first described by Francis Walker in 1858. It is notable as the only member of the Acontiinae known to feed on plants in the Hibiscus. The larval stage, referred to as the 'mallow caterpillar,' has been considered a pest of ornamental mallows.

Tarache delecta or Acontia delecta - Delightful Bird-dropping Moth - male (9597267830) by Andy Reago & Chrissy McClarren. Used under a CC BY 2.0 license.

- 9146 – Tarache delecta – Delightful Bird-dropping Moth (same as Acontia delecta) (9594491953) by Andy Reago & Chrissy McClarren. Used under a CC BY 2.0 license.

- 9146 – Tarache delecta – Delightful Bird-dropping Moth (same as Acontia delecta) (9597309684) by Andy Reago & Chrissy McClarren. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Tarache delecta: /ˈtæɹəkiː dɪˈlɛktə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Larvae can be distinguished from similar Acontiinae caterpillars by their plant association with Hibiscus; Tarache delecta is the only member of its known to feed on this . The dark purple ground color with orange-edged black spots is distinctive. are identified by their bird-dropping mimicry pattern and confirmed by dissection or molecular methods.

Images

Habitat

Associated with stands of Hibiscus lasiocarpus (hairy rose mallow) and other Hibiscus . The inhabits areas where its plants grow, typically in open, moist supporting mallow .

Distribution

Eastern and central North America. Documented from western Kentucky, Oklahoma, and New Jersey. The ' range corresponds with the distribution of its Hibiscus plants.

Seasonality

Larvae have been observed in late summer (August in Kentucky). activity period not explicitly documented in sources.

Diet

Larvae feed exclusively on Hibiscus , including Hibiscus lasiocarpus. They consume upper and lower leaf surfaces, usually near margins, creating large holes in leaves and sometimes damaging bracts around buds.

Host Associations

Hibiscus lasiocarpus - larval food planthairy rose mallow
Hibiscus - larval food plant-level association; only Acontiinae member known to feed on this genus

Life Cycle

Complete with , larva, pupa, and stages. Larvae are the feeding stage and reach 34–36 mm at maturity. details not documented. Adults emerge and reproduce, with females laying eggs on plants.

Behavior

Larvae feed on leaf surfaces near margins, creating large holes. They have been observed feeding on bracts around flower buds. activity is inferred from characteristics and the ' attraction to light.

Ecological Role

Herbivore specializing on Hibiscus. As a leaf-feeder, it contributes to nutrient cycling and may influence plant growth dynamics in mallow . Serves as prey for and .

Human Relevance

Considered a pest of ornamental mallows. Historical control recommendations included arsenate of lead spraying (now obsolete). The is of minor economic importance and is not a significant agricultural pest.

Similar Taxa

Other Acontiinae larvaeSimilar body plan and coloration; distinguished by plant (Hibiscus exclusive to T. delecta) and specific spot pattern (dark purple with orange-edged black spots)
Tarache areloidesSimilar bird-dropping mimicry in stage; distinguished by distribution, , and larval plants

More Details

Taxonomic Note

The has been transferred between , formerly placed in Acontia as Acontia delecta. It is now classified in Tarache.

Historical Pest Status

Weiss (1919) documented this as 'the more important insect enemies of the rose-mallow in New Jersey,' indicating regional pest status in the early 20th century.

Identification Resources

Larval descriptions appear in Crumb (1956) and Weiss (1919), with photographic plates in the latter. The is not included in Wagner (2005) 'Caterpillars of Eastern North America,' contributing to identification challenges.