Gary Herritz: Travel with Birdfy Episode 3 - The Day After The Biggest Week In American Birding

Table of Contents

    Share

    Looking for something to do after The Biggest Week in American Birding in Ohio, I decided to make the trip to Grayling, Michigan. I was in search of North America's rarest warbler: the Kirtland’s Warbler. This blog recounts my experience and also why the bird is so rare.

    My voice was shaking with excitement as I whispered:

    "I'm surrounded by one of the most rare warblers in North America. The Kirtland’s Warbler. That song that you're hearing- right there- they winter in the Bahamas. They're rarely seen on migration, and they come to their breeding grounds in Michigan, and a little bit in Wisconsin. They require young jack pines, like these, and intensively managed habitat. This is an incredible experience. I don't know if I'll get to see one but hearing them is almost more magical, enjoy"

    -My impromptu narration while filming in Michigan.

    The Kirtland’s Warbler is a ground nesting habitat specialist, and a rare songbird that nests almost exclusively in young jack pine forests of Michigan. Their population declined sharply in the 20th century due to habitat loss caused by fire suppression.These warblers depend on large areas of young jack pine, typically sustained by periodic wildfires. As wildfires were suppressed, suitable habitat became increasingly rare.

    The Brown-headed Cowbird, a native species and brood parasite, also contributed to the warbler’s decline by laying its eggs in warbler nests. While cowbird parasitism is natural, its impact on Kirtland’s Warblers became more severe as habitat loss left the warblers increasingly vulnerable.

    Intensive recovery efforts began in the 1970s when there were only about 200 pairs left. The focus was on restoring jack pine habitat through planting and prescribed burns, as well as targeted cowbird control. These measures led to steady population growth. By 2019, the warbler population had surpassed recovery goals and the species was removed from the U.S. Endangered Species List. Ongoing habitat management remains vital to its continued success. The population today is around 4800 individuals.

    I once heard the Kirtland’s Warbler described as “picky” and when a species is facing extinction, I believe words matter. The Kirtland’s, being a habitat specialist, is also an indicator species. When the population of an indicator species starts to decline, it's nature's way of waving a red flag and saying “hey, something is wrong”. Birds serve as highly visible indicator species that make accurate observation and research a little easier. Brown-headed Cowbirds receive a lot of blame and even villainization for the trials of the Kirtland’s. I believe it's important to always ask “why” and in this case, the cowbirds weren't the ones who changed the habitat. It's interesting that brood parasites have been around for many millennia and only in the last 100 years have become an issue. The real problem? Habitat loss. When birds tell us something is wrong, we should listen because in time, we are all affected. As their name implies, habitat specialists can only survive in very limited areas, not unlike some communities of our fellow humans. By helping them, we help everyone.

    I listened carefully for one that seemed to be on the move. It was responding to another bird and sounded closer with each call. The birds had recently arrived and were establishing breeding territory. In about 10 minutes, my world would change when that bird flew to a bare limb to give its call. I had heard several, but this would be the only one I would see. After the bird left to look for its rival, I backed out quietly and returned to my vehicle. This encounter exceeded every dream I had about experiencing the Kirtland's Warbler. Joyful birding, everyone.

    1 comment

    If you go: There are free trips in the area you can find through a web search. I used eBird to look for recent sightings in publicly accessible areas and went alone. I stayed in the Houghton Lake area and also visited Hartwick Pines State Park. They have feeders behind the visitors center that occasionally bring in Evening Grosbeak.

    gherritz | Jul 21, 2025

    Leave a comment

      1 out of ...