April 16, 2020 – When the spring rains create temporary flooded pools in the agricultural fields, pastures, and on the low well saturated land of restored prairies here in Northern Illinois, the migratory shorebirds large and small will show-up tired and hungry. A variety of shorebird species are working their way across Illinois this time of year. These birds must feed and rest and sometimes wait for the right weather conditions as they instinctively know when to continue the push north. The mudflat-like edges surrounding the flooded slow draining areas in the fields are the perfect habitat where these birds can find the tiny worms, mollusks, and insects that are important to rebuild their depleted energy. Building up fat reserves and resting is key to the survival for both medium and long distance migrants as they pass through on their challenging springtime journey, moving to their northern summer nesting areas. Many of the shorebirds travel great distances to reach their nesting areas on the high Arctic tundra. Pectoral Sandpipers spend the winter on the wetlands and agricultural areas of South America but they nest many thousands of miles north on the sometimes cold springtime Arctic tundra. Here in Illinois we see many flocks, some quite large, of the Pectoral sandpipers using the flooded fields to rest and feed as they work their way north. The sandpipers stay together in and around the flooded wet spots feeding, preening and occasionally taking to the air when a bird of prey comes too close. Flying in a tight pattern the birds circle back and forth until all is clear and then quickly return to the same wet spot to continue their feeding. The much larger Greater Yellowlegs has longer legs than the Pectoral Sandpiper and are often in deeper water searching for prey. The Greater Yellowlegs migrates a shorter distance than the Pectoral. They spend the winter on the Atlantic coast, the Gulf coast, Florida, Mexico, Central and South America. The Greater Yellowlegs nest across Canada just south of Arctic Circle and on the coastal areas of Southwestern Alaska. Those are just two species that are fairly easy to identify during the northern movement, there are many others to watch for in these short-lived shallow pools that temporarily linger in the fields. Some of these shorebirds are quite small, others are in their impressive breeding plumage, sometimes there are rare species, but one thing is for sure they all are in need of food and rest as they still have many miles ahead.
September 19, 2019 – Common yellowthroat warblers are a summer visitor during their nesting season here in northern Illinois, across all of the United States, and most of Canada. A first winter male Common yellowthroat can have a faded black mask from July to March while the adult males have a stunning coal back mask with a white border across the top of the mask and a bright yellow throat that extends down the chest. The flashy little males can stand out in contrast of their habitat at woody edges of a marshy thicket. The small warbler sometimes give away their location by the clear and rapid song of wich-i-ty, wich-i-ty, wich-i-ty. Often though, the little bird appears without notice clinging to one side of the rigid stem of a cattail or other suitable plants, pausing momentarily before disappearing into the thick undergrowth searching each leaf and stem for insects. The female Common yellowthroat have a pale yellow throat and they lack the black mask and white headband of the male. The muted colors of the female yellowthroat are beautiful tones of brown, gray, and olive-yellow. The nesting Common yellowthroat put their nest in thick growth well hidden and low to the ground. The parents drop down into the nest area but always leave from a different route to fool potential predators. After the nesting season, by November the little birds have gone south for the winter. The little warblers will return to our area of northern Illinois in the spring and are here in numbers by April. The Common yellowthroat is a Neotropical warbler that winters in Mexico and Central America, with non-migrating permanent residents in the southern coastal areas of the United States and western and central Mexico.
September 12, 2019 – The House finch is a native of the west with a range that stretches from Oregon south into Mexico and east to the western edge of the Great plains. The House finch is very much at home in desert habitats of the southwest. Today though, after being illegally introduced in the 1940’s in the state of New York, their range has expanded to include most of the the Eastern half of the United states with kind of a gap between the eastern and western populations across the Great plains that runs from Canada south to eastern Texas. The expansion into the eastern United States was a result of escaped finches from the illegal pet trade. The captured House finches from the western United States were sent to pet stores in the east. The House finches were marketed as the California Linnet and the Hollywood finch, but soon failed as caged pets. The finches did succeed as escaped wild birds breeding and expanding their range. The proliferation of House finches along with changes to habitats by humans is believed to be key in the decline of the Cassin’s finch in the west and the Purple finch in the east, two species very similar in appearance to the House finch. The House finch is mainly a seed and fruit eater, when fruit is in season. Flocks can be spotted in Eastern red cedar trees feeding on the fruit in late summer. House finches are social and are common in numbers at backyard feeders, here in Illinois, competing for food with other finches like the Purple finch and the Gold finch.