A few days ago I got in an early morning at Millennium Park and beat our recent heat wave. The first thing I heard were red-wing blackbirds, robins, song sparrows, and savannah sparrows. The introductory notes and two buzzy phrases of their songs compelled me to start up the hillside in search of these grass loving sparrows. While the first group of birds I came across were house sparrows, I quickly found plenty of savannahs, with the males all jockeying for good perches from which to sing. I was actually slightly surprised by the amount of savannah song, I would have thought they would be in chick raising mode, not defending territory and finding mates. During the summer months they primarily eat insects (including spittle bugs), while in the winter they switch to seeds. One male hopped up on a sign post right in front of me (it was the tallest perch around) and started to sing. This allowed me to grab a good recording of a song that is often too faint. I also had some great views of his yellow eyebrow that is his most striking feature. The savannah sparrows song is roughly similar to our more common song sparrows. Both have several introductory notes and end in trills. But while the song sparrow has a highly variable middle portion, the savannah has another trill that is a higher pitch than the trill he ends with.
Red-winged Blackbird
After spending some time amongst the savannah sparrows, I headed back down the hill towards the boat ramp. In the marshy area right by the parking lot red-winged blackbirds were calling and even found a female or juvenile with a good amount of orange on the head the throat. When the water is low, mudflats along the Charles are revealed and provide shorebird habitat. But today, with higher water, only two mallards were working the weeds. Warbling vireos, Baltimore orioles, downys, cardinals and a female red-breasted grosbeak were all found along the path near the river.
Female Yellow Warbler with Caterpiller
Yellow warblers seemed to be everywhere I turned, with males singing brightly and numerous females foraging as well. Tree swallows were likewise ubiquitous, sweeping low over the river or above the grassy hillsides. I kept checking the brook hoping for herons or rails (I once found a sora here). Just as I was thinking it was odd that I hadn't seen a single heron, two great blues flew over head, one after the other.
Cedar Waxwing
On the side of the park opposite the river, I encountered a gregarious flock of cedar waxwings with one individual who almost seemed to pose for me. She was lacking the waxy red tips of her wing feathers which are so endearing to this species. Does this mean she was a younger bird? But the silken smoothness of the rest of her feathers was quite evident. All the while watching the waxwings, a common yellowthroat's song came floating up from the marsh. Even though I spent a fair amount of time looking, yellow warblers were the closest thing I found.
Beyond the birds, there was a small mouse or vole that ran across the trail, but it was so fast I didn't get a chance to check it out. I was able to get three good pictures of the wildflowers being grown on the hillsides that make Millennium Park such a great habitat. I didn't have enough space to share them here, so I'll post a new flower picture every few days so you can see them.
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