frass

The frass line is green when fresh and turns brown later.

The frass is brown and deposited in a central line.

The frass visible only in the last part of the gallery.

The frass is deposited in the middle of the mine.

The frass is light green at first but becomes grey later.

The beginning of the mine is completely filled with frass.

The frass line is quite broad, especially in the first part of the mine.

The frass is collected into a ball within the mine.

The frass is deposited on either end of the tunnel.

It is rather indistinct, without any central line of frass.

There is an irregular line of frass running through the mine.

The frass in the second half of the gallery is dispersed.

The frass is gathered along both sides of the gallery.

The first section of this corridor is filled with frass.

Frass is found in a central line, almost filling the corridor.

The frass is brown and almost fills the initial corridor.

The dark green frass is concentrated along the edges of the mine.

The mine consists of a corridor with a central frass line.

The frass line is often interrupted and leaves a clear zone at either side.

The frass fills most of the corridor In the first section.

Frass can be found over the entire length in a diffuse central line.

The first part is entirely filled with brown, dispersed frass.

The whole mine, except the last 20 mm, is filled with frass.

The frass is deposited in the gallery, almost filling it.

The frass is scattered across the entire width of the mine.