- https://gurneyjourney.blogspot.com/2015/04/circumzenithal-arc.html
- https://www.jeffgrahamphotography.com/blog/tag/birding
- Jeff Graham's Profile, Daily Kos
- https://www.jeffgrahamphotography.com/blog/tag/birding (with Equipment list)
- https://www.dailykos.com/groups/Birds%20and%20Birdwatching
- The Natural History of Bodega Head
Sunday, June 20, 2021
Nature and Nature Photography and other Sites
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