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Eurema hecabe, the common grass yellow, [1] [2] is a small pierid butterfly species found in Asia, Africa and Australia. [1] [2] [3] They are found flying close to the ground and are found in open grass and scrub habitats.
Bangladesh has a labor force of 71.4 million, [168] which is the world's seventh-largest; with an unemployment rate of 5.1% as of 2023. [169] Its foreign exchange reserves, although depleting, [170] remain the second-highest in South Asia, after India. Bangladesh's large diaspora contributed roughly $27 billion in remittances in 2024. [171]
The National Botanic Garden of Bangladesh and the Bangladesh National Herbarium make up the largest plant conservation center in Bangladesh, with an area of around 84 hectares (210 acres). It is located at Mirpur-2 in Dhaka - 1216 , beside the Bangladesh National Zoo. It was established in 1961.
Lexias pardalis and L. dirtea are also among the most colourful archdukes. Sexual dichromatism is however extreme, with the two sexes appearing entirely different. The males' dorsal wing surfaces are a dramatic combination of velvety black forewings and metallic blue green to violet covering the margins of the forewings and hindwings.
Life cycle of the monarch butterfly. Butterflies in their adult stage can live from a week to nearly a year depending on the species. Many species have long larval life stages while others can remain dormant in their pupal or egg stages and thereby survive winters. [36] The Melissa Arctic (Oeneis melissa) overwinters twice as a caterpillar. [37]
The fauna of Bangladesh includes about 1,600 species of vertebrate fauna and about 1,000 species of invertebrate fauna based on incomplete records. The vertebrate fauna consists of roughly 22 species of amphibians , 708 species of fish , 126 species of reptiles , 628 species of birds and 113 species of mammals . [ 1 ]
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The scales on butterfly wings are pigmented with melanins that can produce the colours black and brown. The white colour in the butterfly family Pieridae is a derivative of uric acid, an excretory product. [13] [40]: 84 Bright blues, greens, reds, and iridescence are usually created not by pigments but through the microstructure of the scales.