Submitted date: 19 September 2023 Accepted date: 30 April 2024 Published date: 30 May 2024 Pp. 28-29.
Tracking the migration of Albatross butterflies (Appias sp) in Sri Lanka
P.K. Dissanayake*, R. Gamage2, R.W.D.L. Kumara, N. Weerasinghe, D.M.N.P. Daundasekara, H.S.B. Wijesinghe & S.K. Gunatilake *Corresponding author. E-mail: kapila@agri.sab.ac.lk
Among insects, butterfly migration is an eye-catching behaviour that occurs around the world. The mass migration of butterflies is little understood. In Sri Lanka, mass migrations of butterflies were recorded in the past, but they are now rare. Although those large migrations have not been observed during the past decades, more isolated small migrations do still occur occasionally. However, no definite direction of flight has been identified for these migrations except for point observations of directions. It is unclear in most instances where the butterfly migrations in Sri Lanka begin and end. Therefore, here we report observations on the migrations of two butterflies, the lesser Albatross (Appias galene Felder & Felder, 1865) and common Albatross (A. albina swinhoei Moore, 1905) during the inter-monsoonal period from March to April 2023. Observations were made at 60 random locations to determine the starting point and the directions of migration.
The Azur sprite or elegant sprite (Pseudagrion decorum Rambur, 1842) is a medium-sized damselfly belonging to the Family Coenagrionidae. This species exhibits sexual dimorphism: males are pale blue in colour with three fine black lines on the mid-dorsum, whereas females are more greenish to yellowish in colour on the thorax. It is a common, widespread species in India, Pakistan, Bangladesh, and Nepal. In Sri Lanka, P.decorum is very rare; with one male recorded from a tank near Mannar in the Northern Province.
Submitted date: 28 August 2023 Accepted date: 30 April 2024 Published date: 30 May 2024 Pp. 26.
Predation of an orb-web spider (Argiope sp) on the baron (Euthalia sp)
M.S. Ahammed* *Corresponding author. E-mail: md.sabbirahammedshawon@gmail.com
The giant cross spider (Argiope anasuja Thorell, 1887) is a carnivore that uses its orb-webs to trap insects and other invertebrates and is widely distributed throughout Seychelles, the Maldives, Iran, Pakistan, India, Bangladesh, Sri Lanka, and Australia (Cocos Is.). Scant information is available on the diet of these spiders in Bangladesh. On 1 April 2021 at 12:17 h, we observed a giant cross spider predate on a butterfly at Kendua (23°04′38.4″N, 91°19′12.3″E), Cumilla, Bangladesh. It was a sunny day while we were passing by a home garden and encountered this phenomenon. The spider was moving on its web, approximately 3 m above the ground. At the same time, a common baron (Euthalia aconthea) was flying around it. After a while, the baron flew into the web and got trapped. As soon as the baron got trapped, the spider wrapped it in silk.
Submitted date: 6 June 2023 Accepted date: 30 April 2024 Published date: 30 May 2024 Pp. 25.
An opportunistic mating attempt of a flower crab spider (Thomisus sp.), India
A. Mhadgut* *Corresponding author. E-mail: naturetalks2320@gmail.com
Flower crab spiders of the genus Thomisus, Walckenaer, 1805 have a crab-like habitus with its first two pairs of legs that are long and robust. The Thomisus spiders do not build webs, but instead capture their prey using ambush, or sometimes by active pursuit hiding in flowers, leaves, and leaf litter. Some species flatten their bodies to hunt inside crevices or tree trunks under loose bark. Most of the Thomisus species are sexually dimorphic, males are much smaller than females. On 2 November 2020, I observed a female crab spider capturing a chestnut bob butterfly (Lambrix salsala) while it was trying to feed on the nectar of Jamaican spike flowers, Stachytarpheta jamaicensis (Verbenaceae) in the Butterfly Garden located at Sanjay Gandhi National Park (SGNP), Maharashtra, India.
Abstract Pythonidae, an ancient group of Old World, wide-ranging, constrictor snakes, are known to contain a high degree of cryptic diversity. India harbours three python species, Python molurus, P. bivittatus, and Malayopython reticulatus. The former two species are not uncommon within their respective distribution range in India, but occurrence of the latter has only been confirmed in the Nicobar Islands, and there are two orphaned records from eastern West Bengal. We confirm the occurrence of P. bivittatus and M. reticulatus in Northeast India based on genetics using the mitochondrial cytochrome b gene and morphological characters. Our study reveals multiple lineages among M. reticulatus, corroborating previous studies, and further reveals the absence of a barcode gap between sequences submitted as P. molurus and P. bivittatus among the sampled DNA sequences, and an unexpected lineage of Northeast Indian P. bivittatus based on a sample divergent from the East and Southeast Asian populations that will need further systematic assessment.
Key words : Burmese python, DNA barcoding, phylogenetics, reticulated python, wildlife forensic