Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Holmes.R
1959
Crolia alpina
12 June Barrow, Alaska
not observed. One pair was noted
copulating. The female was laying
on the snow, and the 8 was just
flying off when they were first observed.
After a second or so, the 4 stood up &
flew off after the 8.
1330-1630. Many pairs seen in both
Area and the Area S. of the
village. The birds are mostly
all paired now and can be
seen chasing over the tundra.
The 8 are often seen in their
flight display which may
last up to a minute or two
or even longer. Upon landing,
near a 4, its wings are held
high & are then brought slowly
into the body. The 4 in this
case was seen to raise her
wings as the male landed
and then lowered them slowly
into normal resting position.
This seems to be some kind of
recognition display. If the 8
lands where there is not a female,
he will carry out the same
display. In this case, it may be