Domestic Huntsman Spider (Heteropoda venatoria)
Sungei Buloh, 25th August 2014
This Domestic Huntsman Spider was found on the ground, seriously injured and weakly twitching. A while later, when attempts were made to elicit a response through gentle touching, it was completely unresponsive; it’s likely that this spider died from its injuries.
Fig. 1. Right side of the python’s head showing the extent of tick infestation. Fig. 2. Left side of the python’s head showing the extent of tick infestation. Fig. 3. Underside of the python’s head showing the extent of tick infestation. Photographs by Law Ing Sind
A tick-infested Reticulated Python (Malayopython reticulatus)
Location, date and time: Singapore Island, Central Catchment Nature Reserve, stream along Venus Trail; 14 August 2014, 1008 hrs.
Observation: A Reticulated Python of about 1.2 m total length was found dead in the stream with its head under water. The snake was emaciated and had a total of 14 ticks (F. Ixodidae) of various sizes (between 7 and 18 mm), many bloated with blood, on its head; mainly on the lower jaw. In addition, an unidentified worm-like organism of about 5 cm, probably a parasitic nematode, crawled out from the mouth of the python.
Remarks: The Reticulated Python is relatively common in Singapore (Baker & Lim, 2012: 91, as Broghammerus reticulatus), and most of these snakes have ticks on them. However, the present specimen had an unusually large number of ticks, concentrated largely along the lower jaw. The cause of death is unknown, but the emaciated condition of the snake suggests that it may have starved. The ticks could have contributed to their host’s demise by placing an intense amount of weight and obstruction on the lower jaw, thus making it difficult for the snake to feed. The python may even have succumbed to possible toxic salivary secretions injected into its bloodstream by the ticks (see Court & Wang, 2011). The nematode seems to suggest that the snake had a high parasitic load in its digestive tract, but this was not investigated.
Baker, N. & K. K. P. Lim, 2012. Wild Animals of Singapore. A Photographic Guide to Mammals, Reptiles, Amphibians and Freshwater Fishes. Updated edition. Draco Publishing and Distribution Pte. Ltd. and Nature Society (Singapore). 180 pp.
Court, D. J. & L. K. Wang, 2011. Ticks. In: Ng, P. K. L., R. T. Corlett & H. T. W. Tan (eds.). Singapore Biodiversity. An Encyclopedia of the Natural Environment and Sustainable Development. Editions Didier Millet and the Raffles Museum of Biodiversity Research, Singapore. p. 483.