| I looked for the words "Witcher urgently needed". And then there'd be a sacred site, a dungeon, necropolis or ruins, forest ravine or grotto hidden in the mountains, full of bones and stinking carcasses. Some creatures which lived to kill, out of hunger, for pleasure, or invoked by some sick will. A manticore, wyvern, fogler, aeschna, ilyocoris, chimera, leshy, vampire, ghoul, graveir, were-wolf, giant scorpion, striga, black annis, kikimora, vypper... so many I've killed.
— page 116, The Last Wish (UK edition)
| Yes, hmm... Mention can also be found, in the great books, of the subspecies "Pseudohyphydra", which lives in the marshy waters of Angren. However, the learned Bumbler of Aldersberg recently proved that this is an entirely different species, from the "Morididae" family. It feeds exclusively on fish and small amphibians. I has been named "Ichtyovorax bumbleri".
— page 177, Blood of Elves (UK edition)
- In the Monsterbook, some comments on the creatures contain quotes. In the entry for devourers, the quote was from The Last Wish: żyrytwa was replaced by naucoris.
- Danusia Stok translated the Polish żyrytwa as ilyocoris.
- Ilyocoris cimicoides is better known as (creeping) water bug in the real world. Naucoris is a genus of Nepidae, the water-scorpions.