Spring songs

In May the natural world of Lake County, Illinois clamors for attention. Frogs peep, toads trill, insects buzz and chirp, but the all-stars of the show are birds. Perching songbirds, referred to scientifically as oscine passerines, are known for their amazing and extremely varied sounds. For many small and secretive species, their calls and songs are often the only way to identify individual birds within the chorus.

wood_thrush_glamor

Shorter, non-musical bird calls are heard year-round. Calls are used in social interactions and as alarms. They are considered innate. However, scientists have determined that birds’ longer, melodic songs are learned in the first year of life. Birds use these spring songs, some containing several melodies, primarily in establishing territory and breeding. Continue reading

A snowy spark

Many years ago, while running along the Lake Michigan shoreline late on an evening in January, a feathered ghost appeared on top of a flag pole. It was the first time I had ever seen a snowy owl (Bubo scandiacus) and it stopped me in my tracks. This was the spark on that frozen night that lighted my fire of curiosity about birds. This winter, snowy owls have left their Arctic homes in record numbers, causing one of the largest irruptions (sudden increase) in northern Illinois in decades.

Although it seems natural to correlate the arrival of these boreal birds with the extremely cold, snowy winter northern Illinois is having, experts say the motivator is more likely linked to food. On their Arctic breeding grounds, snowy owls feast under 24-hour sunshine. Their food of choice is lemmings, small mammals with an extremely cyclical population. Bird expert Kenn Kaufman explains in a recent Audubon magazine article, that when the lemming population explodes, like it did last summer in northern Quebec, snowy owls have great breeding success, producing large broods of up to 11 chicks. As these chicks quickly grow into juvenile birds, the competition grows for the now dwindling numbers of lemmings. Thus, the young birds get nudged further and further away to find a meal, resulting in them moving to areas that mimic their treeless tundra home, such as the Lake Michigan shoreline. Continue reading

Heron highrise

This past weekend I had the pleasure of hearing Kenn Kaufman, a naturalist and bird expert, speak at the Smith Nature Symposium. He is somewhat of a “rock star” in the birding world. His novel, Kingbird Highway, chronicles a personal adventure hitchhiking around the country at the age of 16 on a quest to find birds—a story that has reached the status of folklore. Many years later, and surely a much longer “life list,” his keynote address at Ryerson Conservation Area focused on warbler migration: the phenomenon of these teeny tiny birds in every hue of the rainbow that travel thousands of miles across entire continents each spring and fall. He presented complicated doppler maps and in-depth scientific research on these migratory dynamos, but by the end of the discussion the focus had shifted to something more simple: the children from his young birders club.

guide-bookLate that evening, as I settled down with one of his many guide books, Field Guide to Advanced Birding, I was struck by this same theme of simplicity. Kaufman urges folks to slow down and focus not on looking for the birds, but instead to spend time looking at the birds. He stresses getting to know the common birds of an area very well. By doing so, we are well on our way to knowing when a rare bird may enter the scene. This concept brought to mind one of the best places to take a long look at one common bird of Lake County, Illinois: a great blue heron rookery.

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Warbler fever

Birding fever hit a high this past weekend in natural areas throughout northern Illinois. Birders flocked in throngs with binoculars strung on their necks like potential Olympic medals and a hope of spotting some of the most coveted migratory birds— wood-warblers. Members of the family Parulidae, wood-warblers are the colorful jewels of migration from the sapphire blue of a cerulean warbler (Setophaga cerulea) to the amber orange of a Blackburnian warbler (Setophaga fusca). Yet, as these birds flit about in the treetops, no color is as visually striking as the lemony-yellow citrine that adorns so many warblers as they pass through our area on a flyway. Once these impish birds reach their destinations (as far as northern Canada for some species) and breed, they will molt their flamboyant plumage and become far less conspicuous, which is why seeing them in the spring is considered such a prize for birders.  Continue reading

Glimpses from the car window, bootprints on the trail

Like most of you reading this, my life is busy. Even though I work outdoors in the forest preserves, not all of my nature experiences occur there. Many days I have to take the glimpses of nature where I can get them. On my drive home from work last week, glancing at the “not-so-glamorous” retention pond next to the tollway, I spotted my first hooded merganser of the year. I knew the gang was back, although some of them not for long. This “gang” I’m referring to is the group of migratory waterfowl that show up here in the early spring during migration en route to their final destinations further north. With names like horned grebe, American wigeon, northern shoveler, and gadwall (just a few of the species seen in the past few days at Independence Grove Forest Preserve, here is the complete list), who wouldn’t want to meet this cast of characters?

This time of year is the perfect opportunity to take a peek at some fascinating birds close to home. Continue reading