Tips for Hummingbird Feeders:
Nectar Recipe and Tips for Feeding Hummingbirds (Audubon)
Essential Tips for Hummingbird Feeders (Wild Bird Unlimited)
Separating Hummingbird Feeders (Wild Bird Unlimited)
Hummingbird Safety (Perky Pet)
Providing a Water Source for Hummingbirds:
Attracting Hummingbirds With Water (The Spruce)
Create Your Own Water Source For Pollinators (Bee the Change)
Designing Your Garden:
Attracting Pollinators for Gardeners (Pollinator Partnership)
Design a Hummingbird Garden (Brooklyn Botanic Garden)
Gardening for Pollinators (US Forest Service)
Planting Guides:
California Native Plants Used by Hummingbirds (Las Pilitas Nursery)
Pollinator Friendly Planting Guides (Pollinator Partnership)
28 Common Flowers That Attract Hummingbirds (Bird Watching)