These dates indicate the approximate arrival and departure times of migrants commonly seen in Marin County. Some individuals usually will be found both before and after these periods.
|February | March | April | May | June | July | August | September | October | November | December | Locations|
||Rufous Hummingbird, Barn Swallow|
|Mid||Red Knot, Caspian Tern, Northern Rough-winged Swallow, Cliff Swallow, Bullock's Oriole|
|Late||Pacific-slope Flycatcher, Wilson's Warbler|
|Mid||Vaux's Swift, Ash-throated Flycatcher, Western Kingbird, Cassin's Vireo, Swainson's Thrush, Yellow Warbler, Black-throated Gray Warbler, Western Tanager, Chipping Sparrow, Black-headed Grosbeak|
||Sabine's Gull, Olive-sided Flycatcher, Western Wood-Pewee, Lazuli Bunting|
|Departures||Mid||Bufflehead, Say's Phoebe|
|Late||American Wigeon, Black Scoter, Thayer's Gull, Fox Sparrow|
|Departures||Early||Northern Fulmar, Green-winged Teal, Canvasback, Ring-necked Duck, Common Goldeneye, Greater Yellowlegs, Red Knot, Least Sandpiper, Wilson's Snipe, Mew Gull, Herring Gull, Varied Thrush, Lincoln's Sparrow|
|Mid||Horned Grebe, Red-necked Grebe, Eared Grebe, American White Pelican, Semipalmated Plover, Wandering Tattler, Spotted Sandpiper, Ruddy Turnstone, Black Turnstone, Surfbird, Sanderling, Western Sandpiper, Dunlin, Short-billed Dowitcher, Long-billed Dowitcher, Black-legged Kittiwake, Rufous Hummingbird, American Pipit, Cedar Waxwing, Townsend's Warbler, Golden-crowned Sparrow|
|Late||Brant, Northern Shoveler, Pomarine Jaeger, Bonaparte's Gull, Sabine's Gull, Ruby-crowned Kinglet|
|Mid||Lesser Yellowlegs, Wandering Tattler, Western Sandpiper, Short-billed Dowitcher|
|Late||Northern Fulmar, American White Pelican, Spotted Sandpiper, Black Turnstone, Surfbird, Least Sandpiper, Common Tern|
|Arrivals||Early||Buller's Shearwater, Northern Shoveler, Red-breasted Merganser, Ruddy Turnstone, Red Knot, Sanderling, Long-billed Dowitcher, Parasitic Jaeger, Sabine's Gull|
|Mid||Eared Grebe, Green-winged Teal, Semipalmated Plover, Wilson's Phalarope, Red-necked Phalarope, Red Phalarope, Bonaparte's Gull, Townsend's Warbler|
|Late||Brant, American Wigeon, Wilson's Snipe|
|SEPTEMBER||Arrivals||Early||Canvasback, Pomarine Jaeger, Cedar Waxwing|
|Mid||Ring-necked Duck, Dunlin, Black-legged Kittiwake, Say's Phoebe, Ruby-crowned Kinglet, American Pipit, Fox Sparrow, Lincoln's Sparrow|
|Late||Horned Grebe, Bufflehead, Common Goldeneye, Mew Gull, Herring Gull, Varied Thrush, Golden-crowned Sparrow|
|Departures||Mid||Olive-sided Flycatcher, Western Kingbird, Grasshopper Sparrow, Bullock's Oriole|
|OCTOBER||Arrivals||Mid||Black Scoter, Thayer's Gull|
|Departures||Early||Wilson's Phalarope, Western Wood-Pewee, Ash-throated Flycatcher, Cliff Swallow, Black-headed Grosbeak|
|Mid||Sabine's Gull, Caspian Tern, Vaux's Swift, Pacific-slope Flycatcher, Cassin's Vireo, Warbling Vireo, Northern Rough-winged Swallow, Swainson's Thrush, Yellow Warbler, Black-throated Gray Warbler, Western Tanager, Chipping Sparrow|
|Departures||Early||Buller's Shearwater, Red-necked Phalarope, Elegant Tern, Common Tern, Violet-green Swallow, Barn Swallow|
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