Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
GRIEGLER
1956
Cliff SWALLOW (PETROCHALAZON
SITIFRONES)
APRIL BAY FROM ISLAND, ANAMOSA CO., CALIF.
9:30 AM. I SEEN FLYING 6 FT.
OVER SONICORNIA - ONLY IN SIGHT
FOR LESS THEN A MINUTE AND
NO FEEDING SEEN.