體長約4.8~6.8mm,頭部為黑色,體色為紅色,前胸背板為黑色,前緣有2個白色斑紋,小盾板為黑色,翅鞘底色為橙紅色,翅鞘末端有一個錨形黑色斑紋, 前緣近基部各有一個大黑斑相連,有些個體斑點分離,黑斑前緣尚有1個不明顯的紅色斑,個體變異很大。 雌雄頭部顏色略有不同,雄蟲為淡黃色或白色,複眼間有白色塊狀斑,雌蟲頭額部為黑色,兩複眼之間有二個白色小點。
分佈在低海拔山區,成蟲在3~10月出現,全島都可看見,以錨紋型數量最多,在台灣的密度僅次於赤星瓢蟲,是菜園及果樹上常見的捕食性瓢蟲。幼蟲及成蟲以蚜蟲、介殼蟲、飛蝨等同翅目若蟲為食,食性較廣,以桃蚜為主要捕食對象,也會捕食綿蚜、捲葉蚜、菜蚜及玉米蚜等。
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