ML647050070

觀察細節

2 cassia initially went over high, heading southwest. Calls were obviously cassia, low-pitched and hard. I was unable to record in time though. Then, a Type 2 (clear kip kip calls) went over low heading east, seeming to land in a stand of Lodgepole. I missed recording that bird, but was ready when a third cassia headed in the same direction! I tried to find the cassia and type 2, but they must have moved on quickly.