# 🐦 NOTES - BIRDING According to a survey from the U.S. Fish and Wildlife Service, 96 million Americans are bird-watchers, or 37 percent of the population aged 16 and above. Most observe from home, but 43 million have traveled a mile or more to go birding. Most pigeons have orange-colored eyes. The color comes from the concentration of blood vessels that surround the iris of the pigeon’s eye, which is usually yellow or white. Birding Humboldt https://ebird.org/barchart?byr=1900&eyr=2024&bmo=1&emo=12&r=US-CA-023 NPS Redwood Bird check list https://www.nps.gov/redw/learn/nature/upload/bird-checklist-2015-508.pdf Birding – Roughly 280 species of birds have been seen in Redwood National and State Parks (which roughly ⅓ of the species in the US) http://rras.org/a-birding-guide-to-humboldt-county.aspx Best place to go birding * Arcata Marsh & Wildlife Sanctuary * Behind the Eureka Target, Eureka Waterfront Trail * Humboldt Bay National Wildlife Refuge Official list of the birds of District of Columbia https://mdbirds.org/wp-content/uploads/dc-bird-list.pdf It is estimated that 2.4 billion birds per year are killed by domestic cats in the U.S. Clean bird feeder https://lifehacker.com/how-and-when-to-clean-your-probably-disgusting-bird-f-1847206459 Crows vs Ravens Ravens strut has two footed hops; American crow = Corvus brachyhynchos Common Raven = Corvus corax Ravens bigger than crows; Ravens live longer (8 years for crow; 30 years for raven) Ravens move in pairs; Ravens smarter than crows; Crows have high pitched caw-caw; ravens deep croak https://www.audubon.org/magazine/how-tell-raven-crow