Monday, July 31, 2006

Common Jay

Scientific Name :- Graphium doson C & R Felder

Common Jay is a butterfly with a wingspan of 70 - 80 mm. This is a black butterfly with a pale blue, semi - transparent central band that is formed by large spots. There is a marginal series of smaller spots. The underside of the wings is brown, with markings similar to the upperside, but they are whitish. The sexes look alike.

The Common Bluebottle is brighter blue and lacks the series of marginal spots present in the Common Jay.

Status, Distribution and Habitat

The Common Jay is common in the thick, riparian, moist deciduous, semi-evergreen and evergreen forests. It inhabits primary as well as secondary forests, sometimes venturing into forest plantations and orchards situated in the midst of forests. It particularly frequents forest streams and rivers. It is active throughout the year, but more so in the summer. It is distributed at lower elevations in the Sri Lankan and southern Indian forests, including suitable localities in the Eastern Ghats and Satpuras. It extends to bengal and Assam in the east, the himalayan foothills to the north and then throughout southeast Asia.

Habits

This butterfly is active throughout the day, and constantly on the move, so it is difficult to see it settled down. It has a swift and straight flight and avoids no vegetation layer. Its thorax is strong, so it rapidly beats its wings, not fully lowering them in each beat. It can easily travel between the ground and the canopy of the 40 m tall evergreen forests. The resources of the adults are distributed throughout this vertical range. They range from the mud-puddling sites of the males at the forest streams to large shrubs such as Leea, to medium-sized treees such as cinnamomum and large canopy trees. While feeding from flowers, it keeps its wings vibrating, never fully settling on the flowers.

The males gather at mud-puddling sites and usually form their own species assemblages or join other swallowtail butterflies. The group is a very tight one, so the members push against each other in an effort to shift to spots in the surrounding of their original positions. Before retiring in the evening, the butterfly spends a prolonged period investigating and hovering to choose a particular branch to sleep. At rest the wings are closed over the back, but the hind wings do not cover the fore wings.

Reproduction

The egg-laying behaviour is very similar to that of the Tailed Jay. The habits and host plants of the caterpillar and place of pupation are also similar.

The egg is spherical and pale yellow. The young larva lacks the yellowish markings present on the back of the Tailed Jay. and the white line above the prolegs is broader. The grown caterpillar has two forms, It is either dark brown or grassy green, with spines on the 4th segment short, conical and blue centred. They are surrounded by broad lemon-yellow rings which, in turn are surrounded by thin black rings. The osmererium is pale bluish-green and extruded only reluctantly.

The pupa is pale green with a dark purplish median line from the head to the thoracic horn and a yellow line from the tip of the horn to the cremaster.

Larval Host Plants.

The caterpillars feed on Annona lawii, Cinnamomum macrocarpum, Magnolia grandiflora, Michelia champaca, Miliusa tomentosum and Polyalthia longifolia ( Annonaceae, Lauraceae, Magnoliaceae).

7 comments:

Anonymous said...

It would be really good if you can post the photographs of the butterflies also along with your post. Please let me know if you need any help with the photos. I have few photos in my Flickr account. Maybe I can help you in linking those from your blog.

Soorya said...

A fine article... authentic... it is sure to serve as a worthy resource to the butterfly enthusiasts... thank you.

Pradeep said...

Good information about butterflies.
Keep it up!

indipets said...

Hi, I have seen your blog on butterfly gardening and also searched the net a lot. But could not find many plants that are available that could be suitable for butterfly gardening in india. Most plants and butterflies described are from USA Except yours. In your blog there are many butterflies of indian origin. I am so happy. I have a garden and am planning a butterfly garden. Can you help me selecting the nectar and food plants for my garden? I can call you and discuss and get the names of plants and some details. Please will you help me? My number is 09339952258. You can give a miss call. I can also pay you for your consultation fees. Please be a bit quick please.

ആഷ | Asha said...

why no posts after july 2006?

please continue blogging :)

nice blog! found this while searching for information abt butterfly attracting plants.

i'm also from alappuzha. where u in alappuzha?

Anonymous said...

Are you still studying butterflies in India?
I want to contact you!!!

Anonymous said...

Are you still studying butterflies in India?
I want to contact you!!

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