The more you know

The northern lights, or aurora borealis, are colorful light displays caused by solar wind interacting with Earth’s atmosphere. Colors vary by altitude—blue, green, or red. Best viewed near the poles, they can occasionally be seen farther south during solar storms. Unlike predictable celestial events, they’re harder to forecast but peak during solar cycles, with activity expected to be high in 2024–2025. For the best view, head away from city lights and look north around midni

Owls hoot to communicate when trying to defend territory, warn others of danger, or when attracting mates. Most are crepuscular or nocturnal, hooting at night, dawn, or dusk. Their calls fall into one of three categories: hoots, toots, or screeches. Each species sounds unique: great horned owls hoot softly, barred owls ask, “Who cooks for you?”, and barn owls shriek. With practice, you can ID them by sound.

Bald eagles are a well-known symbol of the United States, serving as our country's national emblem and national bird. The golden eagle may not be a traditional symbol of America, but other countries have adopted it as one. The golden eagle serves as the national symbol of Albania, Austria, Germany, Kazakhstan and Mexico.

You can estimate temperature by counting cricket chirps. According to Dolbear’s law, count the number of chirps in 15 seconds and add 40 to get the temperature in Fahrenheit. Crickets chirp faster in warmer weather because they are cold-blooded. Only male crickets chirp to attract mates, using a method called stridulation—rubbing wing parts together. This method works best between 55 and 100 degrees and varies by species and other factors.

Turkey vultures and black vultures help clean the environment by eating dead animals. Turkey vultures are more common in northern Illinois and have red heads and dark brown feathers. Black vultures have black heads and black feathers with white wing tips. Turkey vultures use smell to find food while black vultures rely on sight. Though turkey vultures are bigger, black vultures often work together to compete for food.

Wolves and coyotes are wild canines often confused due to similar looks. Wolves are larger, with blockier snouts, smaller ears, and elevated tails when walking. Coyotes are smaller, have pointed snouts and ears, and droop their tails. Wolves once lived in Illinois but are now rare. Coyotes are common across Illinois and North America. Wolves were removed from the endangered species list in 2020 and may be removed from the Illinois list in 2025.

In summer, ponds and lakes bloom with aquatic plants like duckweed, water lilies and American lotus. Though similar, water lilies have pink flowers that float and notched leaves on the water’s surface. American lotus has yellow flowers on tall stalks and large, round leaves above the water. Both grow from rhizomes in calm waters. Water lilies ripen seeds underwater, while lotus seeds float. Lotus is native to Illinois, though some water lily varieties are ornamental.

Cicadas, often mistaken for locusts, are harmless, noisy insects that benefit ecosystems. Locusts, a type of grasshopper, form destructive swarms that devastate crops in parts of the world but are extinct in North America. Illinois has dog-day cicadas, which appear yearly, and periodical cicadas, which emerge every 13 or 17 years. Cicadas spend most of their lives underground feeding on tree roots and help aerate soil before emerging to mate.