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Notes on the Diet of the Checkered

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Notes on the Diet of the Checkered HTTPS://JOURNALS.KU.EDU/REPTILESANDAMPHIBIANSTABLE OF CONTENTS IRCF REPTILES & AMPHIBIANSREPTILES • VOL & AMPHIBIANS15, NO 4 • DEC 2008 • 28(2):189 275–277 • AUG 2021 IRCF REPTILES & AMPHIBIANS CONSERVATION AND NATURAL HISTORY TABLE OF CONTENTS NotesFEATURE on ARTICLES the Diet of the Checkered Keelback . Chasing Bullsnakes (Pituophis catenifer sayi) in Wisconsin: (FowleaOn the Road to Understanding piscator the Ecology and Conservation) Including of the Midwest’s Giant Serpent ...................... the Joshua First M. Kapfer 190 . The Shared History of Treeboas (Corallus grenadensis) and Humans on Grenada: A Hypothetical ExcursionRecord ............................................................................................................................ of SaurophagyRobert W. Henderson 198 RESEARCH ARTICLES . The Texas Horned Lizard in Central and Western Texas .......................Yatin Kalki Emily Henry, Jason Brewer, Krista Mougey, and Gad Perry 204 . The Knight Anole (Anolis equestris) in Florida Madras Crocodile ............................................. Bank Trust andBrian Center J. Camposano, for Herpetology, Kenneth L.Mamallapuram, Krysko, Kevin M. TamilEnge, Ellen Nadu M. 603104,Donlan, and India Michael ([email protected]) Granatosky 212 CONSERVATION ALERT Photographs by the author. World’s Mammals in Crisis ............................................................................................................................................................. 220 . More Than Mammals ...................................................................................................................................................................... 223 . The “Dow Jones Index” of Biodiversity ........................................................................................................................................... 225 he Checkered Keelback (Fowlea piscator) is a medium- 10-m deep well that contained about 1 m of water. The frog HUSBANDRY sized natricid distributed from Afghanistan to southern was sitting on a small embankment on the well wall while the T . Captive Care of the Central Netted Dragon ....................................................................................................... Shannon Plummer 226 China and southeastern Asia (Das and Das 2017). The spe- snake was in the water at the same height. The snake quickly cies is known toPROFILE feed frequently on fish, amphibians, and grabbed the frog, swam to the bottom of the well, pinned arthropods (Hossain. Kraig 2016; Adler: A LifetimeParmar Promoting 2018; Herpetology Greeshma ................................................................................................ and the frog against the substrate, Michael and L. Treglia swallowed 234 it feet-first. This Jayson 2021), occasionallyCOMMENTARY on rodents and amphibian eggs prey item has been reported previously (Hossain 2016) but (Phansalkar and Gowande. The Turtles Have 2017; Been WatchingKalki Me2020), ........................................................................................................................ and rarely prey-handling was not addressed. Eric Gangloff 238 on birds and turtles (Whitaker and Captain 2004; Gyawali At 0445 h on 15 May 2019, I was awoken by the distress BOOK REVIEW 2019). Herein I describe predation and a predation attempt calls of an Indian Bullfrog (Hoplobatrachus tigerinus) at the . Threatened Amphibians of the World edited by S.N. Stuart, M. Hoffmann, J.S. Chanson, N.A. Cox, by F. piscator in Karnataka,R. Berridge, India. P. Ramani, and B.E. Young ..............................................................................................................Agumbe Rainforest Research Robert Station Powell in243 Agumbe, Karnataka, At 1840 h on 24 May 2015, I caught a female F. pisca- India (13.5177°N, 75.0875°E). At the edge of a small man- tor approximately CONSERVATION75 cm in length RESEARCH in a suburban REPORTS: backyard Summaries of Publishedmade Conservation pond, aResearch male Reports F. piscator ................................. approximately 245 75 cm in length in Bangalore, Karnataka, NATURAL IndiaHISTORY (12.9863 RESEARCH°N, REPORTS 77.6951: Summaries°E). of Publishedwas holding Reports on onto Natural the History hindlimbs ................................. of a large 247 male H. tigerinus NEWBRIEFS ...................................................................................................................................................................................... 248 The snake regurgitated EDITORIAL a partially INFORMATION digested adult ............................................................................................................................... female Asian and attempting to ingest it, but...................... the frog 251 was inflating its body Common Toad (DuttaphrynusFOCUS ON CONSERVATION melanostictus: ) Athat Project it hadYou Can swal Support- ...............................................................................................in an attempt to avoid being swallowed 252 (Fig. 1). The struggle lowed feet-first. This is a frequently taken prey item that has went on for about an hour and, toward the end, the snake been reported previously (Hossain 2016). began pushing the frog against the concrete wall of the pond At 1922 h on 4 June 2015, I observed a male F. piscator in an effort to force it down its throat. This strategy appeared approximately 1 m in length feedFront on Cover.a Common Shannon Plummer.Skittering to beBack working Cover. Michaelas the Kern frog’s head disappeared into the snake’s Frog (Euphlyctis cyanophlyctis) atTotat the et vellesequeKalinga audant Center mo for mouth.Totat et However, velleseque audant although mo only its forelimbs were visible, the estibus inveliquo velique rerchil estibus inveliquo velique rerchil Rainforest Ecology near Guddekeri,erspienimus, Karnataka, quos accullabo. IlibusIndia erspienimus,frog was quosstill accullabo. struggling Ilibus and grasping at the vegetation to pull (13.5754°N, 75.1066°E). The predationaut dolor apicto event invere occurred pe dolum in a itselfaut dolor free. apicto Finally, invere pe the dolum F. piscator, apparently unable to breathe, fugiatis maionsequat eumque fugiatis maionsequat eumque moditia erere nonsedis ma sectiatur moditia erere nonsedis ma sectia- ma derrovitae voluptam, as quos tur ma derrovitae voluptam, as accullabo. Fig. 1. A Checkered Keelback (Fowlea piscator) attempting to feed on a large Indian Bullfrog (Hoplobatrachus tigerinus) in Agumbe, Karnataka, India. Copyright is held by the authors. Articles in R&A are made available under a 275 Reptiles & Amphibians ISSN 2332-4961 Creative Commons Attribution-NonCommercial 4.0 International license. KALKI REPTILES & AMPHIBIANS • 28(2): 275–277 • AUG 2021 Fig. 2. A Checkered Keelback (Fowlea piscator) feeding on a Marbled Balloon Frog (Uperodon systoma) in Devarayanadurga, Karnataka, India. regurgitated the frog and swam away. The frog succumbed from the ordeal during the next few hours and was eaten by a Greater Coucal (Centropus sinensis) shortly thereafter. At 1100 h on 16 August 2019, I observed a subadult male F. piscator approximately 60 cm in length feed on two juvenile Indian Bullfrogs (H. tigerinus) in a small pond near Begar, Karnataka, India (13.5093°N, 75.1930°E). The snake was foraging along the edge of the pond, where the frogs were sitting. It flushed one frog into the water, chased it, and swal- lowed it feet-first by pinning it against the base of the pond; it then repeated this sequence of events with another frog. Once Fig. 3. A Mysore Day Gecko (Cnemaspis mysoriensis) regurgitated by a it finished feeding on the second frog, the snake emerged Checkered Keelback (Fowlea piscator) in Bangalore, Karnataka, India. from the water to bask on a floating Areca Palm (Areca cate- chu) leaf. Hossain (2016) previously had reported H. tigerinus as prey of F. piscator. was likely adventitious. Checkered Keelbacks are known to be At 2141 h on 10 June 2020, I observed a female F. pis- opportunistic feeders, eating even discarded rice and pieces of cator approximately 60 cm in length feeding on a Marbled chicken (Moktadir and Hasan 2016). Balloon Frog (Uperodon systoma) in Devarayanadurga, All of these observations feature prey that was swallowed Karnataka, India (13.3722°N, 77.2065°E; Fig. 2). The snake feet/tail-first, which seems to be common in keelbacks, espe- had the frog’s right hindlimb in its mouth and was attempt- cially when consuming anurans (Bhatnagar 2021; Brakels et ing to swallow it. The frog was inflating its body and attempt- al. 2021). Also, most of my observations involve the snake ing to escape by kicking and crawling. By 2147 h the frog’s pinning the prey against either an external object or its own left hindlimb had been ingested but the snake appeared to be body in order to facilitate ingestion. Devkota et al. (2020) having a great deal of difficulty swallowing the frog’s inflated discussed the handling of fish by Checkered Keelbacks, but abdomen. At 2202 h, the snake began pushing the frog prey handling has not been described in most cases. against its own body and by 2206 h had ingested it entirely. The snake then retreated under a rock next to the pond. This Acknowledgements is the first record of U. systoma in the diet of F. piscator. I thank Mohit Verma, Shiyas, Manjunath, and Sachin Gowda At 1023 h on 16 June 2021, I found a road-killed for their assistance in the field. male F. piscator
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