Shorebirds have been moving south for over a month in Chicago but the first passerine (songbird) migrants are just starting to appear. This Olive-sided Flycatcher was taking a break at Montrose on August 14. Link to my eBird checklist for the day below.
The travels of birds are extraordinary. Our Olive-sided Flycather could have come anywhere from Northern Wisconsin to Alaska and will spend the winter in Central or South America. And it will keep making this journey for as long as it’s alive. Not bad for a creature that weighs a little more than an ounce.