Chinese Checkered Beetle
Trichodes sinae
A flower hunter raised inside a bee's nest
The Chinese checkered beetle is a small beetle with a broad red-and-black band across its wing cases (elytra), its body covered in fine down. Adults linger among flowers by day, eating pollen while snatching small insects that visit the same blooms; its bold warning colors make birds think twice.
Key figures
- Length
- About 10–18 mm, small but very easy to recognize
- Life cycle
- One generation a year; overwinters as a mature larva inside the host's nest
- Habitat
- Flowering grassland at forest edges and on the steppe; adults often perch on flower heads
- Diet
- Adults eat pollen and prey on small insects; larvae parasitize bee larvae
- Warning colors
- Its coloring is a classic warning pattern; predators that try it once remember the lesson
- Pollination
- Its hairy body picks up pollen as it moves between flower heads, pollinating along the way
Life cycle
Egg (laid near flower heads or bee nests) → Larva (living inside a bee nest) → Pupa → Adult
Ecological role
Adults visit flowers to eat pollen and prey on other flower visitors, moonlighting as pollinators; larvae live inside bee nests and feed on bee larvae, putting pressure on solitary bee populations and, in turn, on the balance of grassland pollination networks.
Did you know
Its larvae sneak into bee and honeybee brood cells, eating the larvae until they pupate — a headache for beekeepers; yet many other checkered beetles (Cleridae) hunt bark beetles instead, aiding forest health.
Range
Grassland regions of north, northwest, and northeast China, plus Mongolia and Siberia
Status
Common
Anatomy
- Color Band — A broad red-and-black band crossing the wing cases, a bold warning signal
- Down — Fine hairs stand up all over the body, catching pollen grains as it visits flowers
- Elytra — Softer in texture than most beetles', rounded at the tip to cover the whole abdomen
- Compound Eye — Granular compound eyes do all the work of finding blooming flowers by day
- Pronotum — The saddle-like plate behind the head (pronotum) is bell-shaped and narrows toward the rear, sharply set off from the broad wing cases
- Leg — Agile and strong, suited to climbing flower heads and chasing down small insects
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