Pēc indeksa meklējot ir ķērkuši gan nazguli, gan fell beasts, bez tam ir arī pāris vietas, kur nav skaidrs, kurš tieši bļauj. Taču tajās vietās, kur ir skaidrs pateikts, ka ķērc nazguli viņi to dara sāpēs nevis lai iebiedētu pretinieku.
CITĀTS(Fotr @ XI - A knife in the dark)
At the same time he struck at the feet of his enemy [the nazgul]. A shrill cry rang out in the night; and he felt a pain like a dart of poisoned ice pierce his left shoulder.
CITĀTS(FotR @ XII - Flight the ford)
The black horses were filled with madness, and leaping forward in terror they bore their riders into the crushing flood. Their piercing cries were drowned in the roaring of the river as it carried them away.
Lidoņi savukārt brēc aiz neko darīt.
CITĀTS(RotK @ VI - The battle of the Pelennor fields)
Down, down it came, and then, folding its fingered webs, it gave a croaking cry, and settled upont the body of Snowmane, digging in its claws, stooping its long naked neck.
[..]
The winged creature screamed at her[Eowyn], but the Ringwraith made no answer, and was silent, as if in sudden doubt.
Taču šie kliedzieni varēja arī būt vienkārši kliedzieni, nevis šausminošie ķērcieni ar ko nazguli kļuvuši tik slaveni.
CITĀTS(TTT @ VIII - The stairs of Cirith Ungol)
The earth groaned and out of the city there came a cry. Mingled with harsh high voices as of birds of prey, and the shrill neighing of horses wild with rage and fear, there came a rending screech, shivering, rising swiftly to a piercing pitch beyond the range of hearing.
Tātad kliedziens nāca vienkārši no pilsētas, nevis konkrēti no nazgula vai viņa jājamdzīvnieka.
Taču ticamāk, ka tiešām bļāva pats nazguls, jo pēcāk no pilsētas viņš izjāja uz zirga.
CITĀTS(TTT @ VIII - The stairs of Cirith Ungol)
Before them went a great cavalry of horsemen moving like ordered shadows, and at their head was one greater than all the rest: a Rider, all black, save that on his hooded head he had a helm like a crown that flickered with a perilous light.
Tā lūk! Skaidri nekur nav pateikts, taču tā kā arī nazgulu sāpju kliedzieni tiek raksturoti kā "shrill" un "piercing", tad domāju, ka Cirith Ungol tomēr nebija paslēpts kāds fell beast.