• Trail Cam Photos
• Crex Meadows Website

Humans in the Cold Environment:

• Netsilik Eskimos/Inuit Video Documentaries

Research:

• Minnesota Natural Heritage & Non-Game Research

Tracking:

• Outdoor Action Guide to Animal Tracking

Trees:

• Trees to know for Field Interp. II
• Tips for knowing the trees
• Shrub Key
• Evergreen Key
• Tree Key (for trees without foliage)

Night Sky:

• Sky Maps of stars, constellations & planets
• Aurora forecasts

Snow/Ice/Weather:

• Snow Crystals
• Snowflake Bentley
• Sun Halos
• Cloud ID Key
• Video on Snowflakes - from NPR Science Friday

Birds:

• Minnesota Ornithological Union
• Crex Meadows

Mammals:

• MN Mammals - from MN DNR Volunteer
• Wolf or Coyote?

Aquatics:

• Life in a Pond
• Water on the Web - background & curricula on water
• Duluth Streams
• Frogs & Toads of MN
• Frog freezing and thawing video from NOVA
• Duluth Frog Blog

• Life in the cold
• Backyard Almanac
  • Note: this must be purchased for $11.95. Pay Tim B.