Science

There is no single, universally accepted percentage of insect species that can fly, because estimates depend on how researchers classify flight ability and which groups they count. The best broad answer is that most insect species have wings or belong to flying lineages, but a substantial minority are wingless or have lost the ability to […]

A “water bug” is not always a distinct kind of insect: people commonly use the name for large cockroaches, especially the American cockroach, but it can also mean a true aquatic bug. A true water bug lives in or near water and belongs to a different insect group, while a cockroach is a terrestrial insect

North America has many kinds of frogs, from familiar treefrogs and pond-dwelling green frogs to burrowing spadefoots and stream-loving tailed frogs. They belong to several families and occupy habitats ranging from deserts and forests to wetlands, with species and ranges varying across the continent. What Counts as a North American Frog? “North America” can mean

Birds migrate both north and south: many travel north to breed when seasons warm, then head south for winter, while others follow different routes or do not migrate at all. The direction depends on a bird’s species, location, season, food supply, and breeding needs—not on a single rule that applies to every bird. Why Birds

Yes, birds have shoulders: each wing attaches to the body at a shoulder joint, where the upper arm bone meets the shoulder girdle. A bird’s shoulder is built for flight, so its bones, muscles, and range of motion differ from a human’s even though the joint occupies a comparable place on the body. Where a

Blue jays and cardinals are both familiar North American songbirds, but they are easy to distinguish once you know what to look for: blue jays are larger, blue-and-white birds with a crest and a bold black collar, while Northern cardinals are smaller, with a prominent crest and a thick orange-red bill. Their colors, calls, behavior,

A barn owl usually does not make the deep, rounded “hoot” many people associate with owls. Its best-known call is a long, harsh screech or hiss, although it also makes softer sounds, including clicks and snoring-like calls. What a barn owl sounds like The common barn owl vocalization is often described as a shriek, scream,

The closest visible color to infrared is deep red, because red occupies the long-wavelength edge of human vision, next to infrared in the electromagnetic spectrum. Infrared itself is not a color people can see; it is electromagnetic radiation beyond the visible red range. What “Closest Color to Infrared” Means The question has two related answers,

The common bird most associated with round, plain white eggs is the owl, especially species that nest in sheltered cavities. But egg color and shape vary among birds, and an egg’s appearance alone usually cannot identify its species with confidence. Why Owls Are the Best-Known Example Many owls lay white eggs that are rounded or

Organic molecules are generally carbon-based compounds that contain carbon–hydrogen bonds, while inorganic molecules are compounds that usually lack those bonds. The distinction is a useful chemical classification, not a rule that every carbon compound is organic or that organic substances must come from living things. What “organic” means in chemistry In everyday language, “organic” can