Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Holmrs,R.
1960
G.
Erolia fusci collis
30 June Throavik, Alaska
In display The wings are held
at approximately 45°, and the
mid appears to float slowly
down to the ground.
1 July. The birds were very active today near
the south end of the plot. The
following diagram is a summary
of the action in this area:
2 chasing
25°
24°
23°
22°
21°
20°
hard
AWRS-chase
Chase- 4 binds
slept
8 min
3 chase