Harriers hunt low over fields and marsh, so the dream reads them as a close, searching look at the ground of everyday life. Dream books also link them to persistence and to pressure kept up over time.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.