Contents -- Mammals -- Bats -- Black Bear -- River Otter -- Pine Marten -- Mink -- Timber Wolf -- Red Squirrel -- Northern Flying Squirrel -- Eastern/Least Chipmunk -- Beaver -- Red-backed Vole -- White-tailed Deer -- Moose -- Birds -- Common Loon -- Common Merganser -- Mallard/Black Duck -- Great Blue Heron -- Spotted Sandpiper -- Herring Gull -- Turkey Vulture -- Bald Eagle -- Osprey -- Broad-winged Hawk -- Barred Owl -- Spruce Grouse -- Ruffed Grouse -- Common Nighthawk -- Belted Kingfisher -- Black-backed/Three-toed Woodpecker -- Pileated Woodpecker -- Gray Jay -- Common Raven -- Black-capped/Boreal Chickadee -- Winter Wren -- Swainson's Thrush -- Cedar Waxwing -- Red-eyed Vireo -- Warblers -- White-throated Sparrow -- Fish -- Walleye -- Northern Pike -- Lake Trout -- Smallmouth Bass -- Reptiles and Amphibians -- Eastern Garter Snake -- Snapping Turtle -- Western Painted Turtle -- Wood Frog -- Green Frog -- American Toad -- Insects and Other Invertebrates -- Mayfly -- White-tailed Dragonfly -- Black-winged Damselfly -- Spittlebug (Froghopper) -- Water Strider -- Sawyer Beetle -- Whirligig Beetle -- Firefly -- Luna Moth -- Tiger Swallowtail -- Mosquito -- Blackfly -- Deerfly/Horsefly -- Bald-faced Hornet/Yellowjacket -- Fisher Spider -- Wood Tick/Deer Tick -- Leech -- Crayfish -- Appendix -- North Woods Primer -- Table of Measurements -- Keeping Track of Nature -- Observation Checklist -- Phenology Calendar -- Daily Timetable -- Sources.