Congo Flower Beetle (Pachnoda marginata)

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Congo Flower Beetle
Pachnoda marginata
Congo Flower Beetle (Pachnoda marginata)
Name Congo Flower Beetle
Name Lat. Pachnoda marginata
Family Fruit and Flower Chafers
Family lat. Cetoniidae
Order Beetles
Order lat. Coleoptera
Origin Central Africa
Habitat Forest, savanna
Diet Fruits, beetle jelly, maple syrup
Humidity 60-80 %
Behavior Diurnal
Keeping Pair, group
Care Level Easy
Housing Semi-humid terrarium
Breeding Simple
Life Span 5-7 months
Protection No
Metric Units
Size 20-25 mm
Temperature Day 25-27 °C
Temperature Night 18-20 °C
Housing Size 40 x 30 x 30 cm
US Units
Size 0.8"-1"
Temperature Day 77-81 °F
Temperature Night 64-68 °F
Housing Size 15" x 10" x 10"

Distribution and habitat

The Congo rose beetle is widespread in West and Central Africa from Senegal through Cameroon and Congo to Kenya. There they inhabit different habitats, such as rainforest, bush and shrub savannas.


A terrarium of e.g. 40 x 30 x 30 cm (L x W x H) is recommended. A hinged lid terrarium or an aquarium with a tightly closing lid made of the finest gauze is best suited. The terrarium should be placed in a quiet place without direct sunlight

The substrate, at least 15 cm deep, should be a slightly moist deciduous forest or terrarium humus mixed with a little white rotted wood, with the bottom layer (about 5 cm) well compacted. On top of this some foliage for cover (shelter and hiding places) and/or e.g. Flake Soil, some branches for climbing and uprighting and pieces of bark or moss cushions to maintain humidity.

Several times a week the inside of the terrarium should be finely sprayed (humidity), waterlogging and mold should be avoided at all costs

Temp. day: 25-27 °C Temp. night: 18-20 °C Humidity: 60-80

The lighting duration should be 8-10 hrs. Daylight fluorescent tubes supplemented with spotlights that generate the necessary heat are ideal.


The food for adult beetles (imagines) consists of ripe fruit, especially suitable are bananas, apples, pears and mangoes, maple syrup, Beetle Jelly and flower pollen. Fruit and maple syrup meet their fluid needs. Citrus fruits are not suitable

Larvae feed on deciduous forest humus and white rotted wood, shredded as finely as possible for better absorption, or finished products made from fermented wood substrate (e.g. Flake Soil). Moderate feeding (max. half teaspoon per week) of ground silkworm pupae promotes growth.

Recommended feeding is two to three times a week, too little feeding leads to cannibalism among the larvae. A regular and varied diet promotes health and prevents deficiency symptoms.

Reproduction and breeding

The male beetles can be recognized by the furrow on the underside of the abdomen

After mating, the female lays up to 180 eggs in the soil substrate. The generation period is 5-8 months depending on the temperature

At temperatures below 18 °C reproduction does not take place.


There are numerous subspecies and breeding forms, which deviate from the species-typical black-yellow coloration and pattern

They are able to fly well and, like all rose chafer beetles, have the cover wings closed.

It is important to have a certain amount of moisture in the food, because the animals only take the necessary liquid through their food.

A sufficiently deep bottom substrate is essential, as the substrate is both food and habitat for the larvae. The temperature in the moist bottom substrate should be 22-24 °C. A regular substrate exchange is necessary, whereby the intervals can be several months depending on the stocking.

The terrarium must have good ventilation without drafts and meet the species-specific needs. Measuring devices such as thermometers, hygrometers, etc. are necessary. The lighting has to correspond to the species-specific day-night rhythm and has to be placed in such a way that the animals cannot injure themselves. The terrarium should be locked in such a way that neither unauthorized persons can open it nor the animals can escape. Contamination must be removed regularly

Further literature can be found in your pet store.


Text: Nina Rassinger; Image: Nina Leitner

Source: HENKEL & SCHMIDT (2010): Taschenatlas Wirbellose für das Terrarium, Ulmer Verlag; ENGELMAN & LANGE (2011): Zootierhaltung - Tiere in menschlicher Obhut: Wirbellose, Verlag Harri Deutsch