Polwart releases music through her own Hegri Music imprint, named from the Gaelic word for heron. Polwart describes the heron as her favourite animal and her song "Follow the Heron", which she has recorded both solo (on the Scribbled in Chalk album) and with Malinky (on the 3 Ravens album), has been much covered by artists including The McCalmans, Robert Lawrence and Cathie Ryan. The CD booklet for Polwart's "Scribbled in Chalk" includes a heron hidden in one of Sarah Roberts' illustrations.