If there's anyone else out there who has noticed how similar the Pine Warbler and Chipping Sparrow calls are to each other (seriously, when I listened to them back-to-back, I literally started sweating with anxiety), how do you tell them apart in the field?
I do notice that the Chipping Sparrow's call is higher-pitched, and possibly sounds 'weaker' and stays on one note, whereas the Pine Warbler sounds louder, has a lower pitch, and a tendency to sometimes descend at the end, slow down halfway through the call, or slow the entire call down.
Argh, now I'm wondering if some of my ID's are off. There was a definite population of Pine Warblers in a state park near me (you could actually stand below the pines and look straight up to find out the sound was coming concealed from near the tops, and never coming from a deciduous tree), but I have found a Chipping Sparrow visiting my feeders and near those feeders I sometimes hear what I swear is the occasional Pine Warbler. Now I'm not so sure which is which.
