Home

 

 
Butterflies of the Amazon and Andes
Olivencia Tigerwing
Forbestra olivencia  BATES, 1862
Family - NYMPHALIDAE
subfamily - DANAINAE
Tribe - ITHOMIINI
subtribe -
Forbestra olivencia, Rio Madre de Dios, Peru © Adrian Hoskins
Introduction
The Ithomiini comprises of 376 known species, although it is likely that at least another 30 will be discovered in the near future. All are confined to the neotropical region. Ithomiines are unpalatable to birds, and are consequently mimicked in appearance by many other species. These include other unpalatable species ( Müllerian mimics ), not only from the Ithomiinae but also from several other butterfly families. There are also a large number of edible species ( Batesian mimics ) which have evolved similar patterns. Birds have the ability to memorise butterfly patterns and so learn to avoid eating noxious species, but are also fooled into ignoring similarly marked edible species.
Ithomiines are characterised by having small eyes, slender abdomens and long drooping antennae that lack distinct clubs. Males have a plume of long androconial scales or "hair pencils" on the costa of their hindwings. These are hidden from view when the butterflies are at rest, but are displayed when the wings are held open during courtship. Other Ithomiine characteristics include a very slow and deep wing beat, and a preference for inhabiting the darkest recesses of the forest understorey.
The genus Forbestra consists of 3 species - equicola, olivencia and proceris. All are 'tiger-complex' species with elongated wings, and have similar markings. The most widely distributed species is equicola which is found in Venezuela, Surinam, Guyana, Brazil, Ecuador and Peru.
Forbestra olivencia is found in Brazil, Ecuador, Peru and Bolivia. There are 7 subspecies.
Habitats
This species inhabits lowland rainforest at altitudes between sea level and about 500m.
Lifecycle
To be completed.
Adult behaviour

The butterflies are normally encountered singly. They are rather inactive, and fly slowly with deep wing-beats. Males visit Eupatorium flowers from which they sequester pyrrolizidine alkaloids which confer toxic qualities to the butterflies, thus deterring bird attacks. The chemicals are also used in the production of pheromones. These are stored in plumes of androconial scales located on the inner margin of the forewings. The presence of passing females stimulates the males to slowly fan their wings, thereby releasing the scents and enticing the females into copulation.

 

 

Contact  /  About me

Butterfly-watching holidays

Trip reports

UK latest sightings

Frequently asked questions

Strange but true !

Taxonomy & Evolution

Anatomy

Lifecycle

Enemies of butterflies

Survival strategies

Migration & dispersal

Habitats - UK / Palaearctic

Habitats - Tropical rainforests

Butterfly world census

Butterflies of the World :

British Isles

Europe

Amazon & Andes

North America

temperate Asia

Africa

Indian subcontinent

Malaysia & Borneo

Papua New Guinea

Australia & N.Z.

Insects of Britain & Europe

Insects of Amazonia

Moths of the Andes

Saturniidae - Silkmoths

Caterpillars of the World

Butterfly Photography

Recommended Books

Glossary

Links

Code of practice

Copyright - text & images

Copyright - text & images

X

X

X

X

 

All photographs, artwork, text & website design are the property of Adrian Hoskins ( unless otherwise stated ) and are protected by Copyright. Photographs or text on this website must not be reproduced in part or in whole or published elsewhere without prior written consent of Adrian Hoskins / learnaboutbutterflies.com

Site hosted by Just Host