Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Makers
1959
Motacilla flava
Yellow Wagtail
June 15 Saw several today. The first Dusser seen this year. One in particular in evening along Willow Stream circled & called over a small area - on terrace above stream - wooded area. Is this an announcement display - watch for this.
June 16 Witnessed a flight song by a Yellow Wagtail. Heard it singing a dry raspy trill with about 15 notes per song - maybe 20. Given roughly on the same pitch, mouth wide open. Its display consists of flying upwards 20-25 feet. It then drops down with wings straight out, tail elevated + closed, feet & legs extended down.
Lodo relictum. It sings as it descends. The body appears fluffed but must check this point. One bird gave 3 flight displays at spot at edge of Bachel Stream near LT#4 mast. It also sang on the ground. This is spot where I thought I heard a Willow Warbler a few days ago & this song is much like Willow Warbler.
Better check this bird !. Grey head, white mark over eye, dark face patch. Didn't get good look at breast or tail when I wanted to. It flew off.
June 25 Wagtails become common a mile inland beyond Willow Creek. Looks like above description applies to them.
Aug 7 Wagtails have been about trust for past 2 days.