Lassen National Park Red Crossbill and Evening Grosbeak flight call types
- Hi Everyone,
To follow up on my message from a few days ago, I used the Raven Lite
software to generate sonograms of the crossbill and grosbeak recordings
I got at Lassen National Park and at the Subway Lava Tube nearby in
Lassen National Forest last weekend. It turns out that all the
crossbills were type 2s (at Summit Lake, the Devastation Area parking
lot, and at the lava tube). The evening grosbeaks at the lava tube were
flight call type 1s.
On the morning of Oct. 17 we also found red crossbills at Tahoe Meadows
along route 431 in Nevada and evening grosbeaks at the entrance to Lake
Tahoe State Park (also in Nevada). Both sites are close to the
California state line. In contrast with the crossbills near Lassen
National Park, the crossbills at Tahoe Meadows were type 5s. The
evening grosbeaks on Oct. 17 were a mixture of type 1s and type 2s.