Chris Izworski's daily Michigan birding report turns to Delta County this morning, where the past two weeks have delivered solid numbers on the water and some interesting warbler activity inland. The waterbird show remains the county's headline event right now, with 40 Canada Geese and 23 Double-crested Cormorants concentrated at Peninsula Point and the Rapid River boating access site. Peninsula Point in particular is living up to its 273 all-time species reputation; yesterday's reports logged American White Pelicans, eight individuals of them, alongside regular gull and cormorant traffic. The point remains the place to be if you want volume and variety in a single morning.
What makes today notable is the confirmation of Bay-breasted Warblers at Green's Home. Multiple reports flagged this species on August 5 and again on August 15, which brackets a solid week of presence. Bay-breasted Warblers are never common migrants through Michigan's Upper Peninsula, and any multi-day run like this warrants a detour. The birds have shown up at this inland location rather than the typical warbler hotspot of Peninsula Point, so birders chasing this species need to know the geography: Green's Home is slightly south and inland from the coast. If you are anywhere in central Delta County and want to chase fall warblers with a reasonable shot at something less than routine, that is your target.
Warbler Movement and Fall Composition
The broader warbler picture here reflects early fall migration, though the pace remains moderate. Peninsula Point logged Black-and-white Warblers, American Redstarts, Red-eyed Vireos, and Northern Yellow Warblers in the past few days; all of these are standard fall fare, but they represent the vanguard of what should build over the next four to six weeks. In mid-August across the UP, expect drab plumages and subdued behavior. The birds moving through now are mostly local breeders shifting south, not the bulk wave that arrives in late August and September. Numbers are thin enough that Peninsula Point's eight Black-and-white Warblers in fourteen days reads as decent rather than exceptional.
The Willow Flycatcher reported at Portage Marsh on August 14 is worth noting. This species is never abundant in Delta County, and any inland flycatcher sighting during fall migration deserves a mention. Portage Marsh itself has a solid 236 all-time species total, making it reliable water and marsh habitat for migrants pushed inland by coastal wind patterns.
Water Conditions and Today's Prospects
Today's forecast favors morning birding strongly. Mostly sunny conditions with west wind at 5 to 10 miles per hour, low rain chance, and sunrise at 6:48 AM means you have a clean window from first light through mid-morning. The dawn chorus window runs 6:18 to 8:18 AM; if you are targeting the Bay-breasted Warblers at Green's Home or any warbler activity inland, be in place by 6:30. Shorebird season is peaking across the county right now, though the past two weeks of eBird data show minimal shorebird reporting. This likely reflects effort concentration at Peninsula Point and the river accesses rather than absence of birds. Check mudflats and shallow bays if you are along the shoreline.
Thunderstorm chances arriving tonight into tomorrow mean today is your dry window. The Red-winged Blackbirds still present in good numbers at Rapid River suggest marsh habitat is active; 32 birds in fourteen days is solid. Cedar Waxwings and Sandhill Cranes at the same site indicate the mix of habitats Delta County offers.
Recommendation
For a focused session today, prioritize Green's Home for the Bay-breasted Warblers if you need that species. Otherwise, Peninsula Point remains the numbers play: it has logged the most observations and species diversity in the past two weeks, with Double-crested Cormorants, American White Pelicans, gulls, and the warbler pass-through all in one location. The site's 273 all-time species speak to its consistent productivity.
If the Bay-breasted contingent has moved on, you are still looking at standard fall composition and moderate numbers. This is not a peak week, but the birds are moving and the weather today is cooperating.
Track all reports and contribute your own observations to https://birding.chrisizworski.com for the live map and full county data.