About Birch Compass

What's happening in nature where you live — a free, state-by-month reference to the birds, blooms, gardens, night sky, and seasons around you.

We compile what's scattered across public data — bird surveys, bloom calendars, planting dates, astronomical tables — into one clear, state-specific seasonal reference. The free pages give you a genuinely useful monthly overview; the downloadable guides go deep.

How it's made

Every page is compiled from published public sources and reviewed before it goes live. Nature timing varies year to year, so we describe typical patterns and point you to local resources to confirm before you plan around them.

Our sources

• USGS Breeding Bird Survey
• NPS NPSpecies checklists
• USDA PLANTS Database
• USDA Plant Hardiness Zones
• Lady Bird Johnson Wildflower Center
• the Xerces Society
• the USA National Phenology Network
• NOAA Climate Normals
• state agricultural-extension services
• state wildlife agencies
• NASA meteor-shower data

Birch Compass is an independent project. Questions? Email us.