Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
1970
7 Sept sunday.
Calyptra canna
A male performed 9 consecutive dives at 5-6oc in intense breeze over a garden area on Shasta (ca 7pm.)
Jacket turning dive noted, but flight not "mature," i.e., feet are not fully grown or tail not yet fully completed. This strength of display (i.e., full song requested) between dives even when unseen (at this time 2 years.)