Objectives To describe wasp and bee species that sting humans, analyse risk factors and clinical features.

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BackgroundClinically significant manifestations of Hymenopteran envenomation is increasingly recognized in Sri Lanka. These clinical manifestations range from localized allergic reactions to end-organ failure and thrombotic-episodes. We report a case of 65 year old male who developed acute lower limb ischaemia after a sting of the hymenopteran Apis dorsata.Case presentationA 65 year old male with hypertension and hyperlipidaemia presented with envenomation from an attack of a swarm of A. dorsata. He subsequently developed acute limb ischaemia following an acute femoral thrombus and made a complete recovery with anticoagulation and surgical-embolectomy.ConclusionsThis case adds to the spectrum of thrombotic manifestations of Hymenopteran venom highlighting the requirement for close monitoring and clinical vigilance in these patients.