At some point, Ashling tells everyone that she has been talking to the birds some more in the days leading up to the solstice. Her purpose was to see if she could determine any locations where the animals felt strange things as this might be an indicator of where either Sabine or the Primal could be found.
One little sparrow she spoke with the day before the solstice told her something interesting. The sparrow felt the same anger that other birds had reported feeling around the council district (Zyanya's island) but it also felt an oddness at a small inn in the Sclavini district and also at the healer's guild.
The angry feeling in the council district was most likely related to the strange event that happened on the solstice (which Aletha had told her we could do nothing about, by the way). The others could be an indication of Sabine and/or the Primal.