Identification key to male skimmers

Keeled Skimmer
abdomen powder-blue, lacks yellow lateral spots and black tip, antehumeral stripes broad and creamy, wings clear, pterostigma long and yellow		 Black-tailed Skimmer
abdomen powder-blue with yellow lateral spots and black tip, antehumeral stripes inconspicuous ? absent, wings clear, pterostigma dark

Nelson, B., Thompson, R. & Morrow, C., 2000 (June 29). [In] DragonflyIreland http://www.ulstermuseum.org.uk/dragonflyireland/

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