digraph {
concentrate=true;overlap=scale;"tool=Trochilus" [label="tool\nTrochilus",shape=box,style=filled,color=deepskyblue];"tool=Trochilus" -> "rat=Trochilus" [label="similar",dir="both"];"rat=Trochilus" [label="rat\nTrochilus",shape=box,style=filled,color=deepskyblue];}