The more you know

House and purple finches can look alike, but timing and subtle features help tell them apart. House finches stay year-round in Illinois, while purple finches visit in winter. Males differ in red shades—house finches are orangish-red, purple finches are raspberry-colored. Females are brown, but purple finches have bold face markings. Both eat seeds and visit feeders. Cassin’s finches look similar but don’t live in Illinois.

“Leaves of three, let it be; leaves of five, let it thrive” helps tell poison ivy from harmless Virginia creeper. Poison ivy has three leaflets and causes rashes; Virginia creeper has five and turns bright red in fall. Poison oak and poison sumac also cause allergic reactions. About 85% of people are allergic to urushiol, the rash-causing oil. Rashes aren’t contagious but can last weeks. Severe cases may need medical care. Never ingest these plants.

Hay and straw look similar but serve different purposes. Hay is green and nutritious, made from grasses or legumes, and used to feed animals. Straw is yellow, hollow, and made from the leftover stalks of cereal crops like wheat; it’s used for bedding, mulch, decoration, and erosion control. Straw lacks nutrients but is fluffy and absorbent. Hay can even catch fire if stored wet, due to heat from microbial activity.

The spotted lanternfly is an invasive insect from Asia that damages over 100 plant species, including grapevines and maples. Though harmless to humans, it harms trees by feeding on sap and spreading fungus. First seen in the U.S. in 2014, it reached Illinois in 2023. It spreads fast and lays eggs on trees and man-made objects. Residents are urged to learn its life cycle, report sightings, and destroy the insect to help slow its spread.

Bird beaks come in many shapes, each suited to their diet. Cardinals have cone-shaped beaks for cracking seeds, while owls have hooked beaks for tearing meat. Robins and warblers use tweezer-like beaks for insects, and woodpeckers use chisel beaks to dig out bugs. Hummingbirds sip nectar with pipette-like beaks, and ducks strain food from water with colander-like beaks. Beak shape offers clues about what a bird eats and where it lives.

Beavers, the largest rodents in North America, are closely related to the Eurasian beaver. Both are herbivores and keystone species that shape ecosystems by building dams. Though similar in appearance, Eurasian beavers have lighter fur and narrower tails. Capybaras, native to Central and South America, are the world’s largest rodents. Both beaver species were once nearly extinct due to overhunting but have made partial recoveries through reintroduction efforts.

Slime molds, like the chocolate tube slime mold, are brainless yet smart single-celled organisms that move and feed like amoebas. They’re not fungi, plants, or animals, but they break down organic matter and help soil. Found on rotting wood, they change shape, form spores, and can solve mazes. Their odd looks inspire names like dog vomit and scrambled eggs. Look for them in warm, damp forests on logs and leaf litter.

Grasses cover over 26 percent of Earth’s life and grow on every continent including Antarctica. They have hollow stems, leaf blades, and tiny wind-pollinated flowers. Grasses grow from nodes, spread by underground runners, prevent erosion, and support wildlife. Humans eat grass seeds like wheat, rice, and corn. In Will County, native grasses like big bluestem, prairie dropseed, and golden plume still thrive in prairies like Prairie Bluff Preserve.