Three Wisconsin Birds that Weigh Less than an Ounce

by Joseph Zheng, age 10

Wisconsin's smallest birds can weigh less than a pencil. The Downy woodpecker, American goldfinch, and house sparrow are all examples of small birds commonly found in the state.

The Downy woodpecker is 11 to 14 centimeters long and typically weighs around 20 grams. These woodpeckers are frequently seen at bird feeders, where they enjoy suet, sunflower seeds, peanuts, and even peanut butter. Downy woodpeckers are also fond of drinking sugar water. They produce high-pitched calls that are easy to recognize, along with rapid drumming sounds created by tapping their feet during mating displays, which can sound continuous due to their speed.

The American goldfinch, another small bird, is 11 to 14 centimeters long and weighs 11 to 20 grams. These bright yellow birds are common in Wisconsin and are attracted to sunflower and Nyjer seeds. However, they are often intimidated by larger birds and prefer quiet spaces to feed. Goldfinches are strict vegetarians, feeding mainly on seeds—a rarity among birds, as most feed on insects. To ensure their young have enough to eat, goldfinches breed a month later than other birds. Their call is often described as sounding like the words "potato chip" stretched out.

The house sparrow, though not native to Wisconsin, was introduced from the Middle East to help control insect populations. Ironically, this species has become invasive and is now widespread. House sparrows are around 16 centimeters long and weigh 24 to 39 grams. Their call is a simple chirp.

These small birds are just a few examples of the wide variety of bird species in Wisconsin. Despite their differences, they share many common traits, contributing to the diverse birdlife of the state.

[Sources: Wisconsin DNR; The Nature Conservancy; Bird Watching HQ]