Grosbeaks are birds that are known for their sturdy looking build and thick bill. While they all share a similar appearance, grosbeaks are actually comprised of birds from two separate groupings. Out of five species of grosbeaks that live in the continental United States, three of them are technically in the cardinal family along with birds like tanagers, and the other two are in the finch family. Here is everything you need to know about the Grosbeaks of Iowa.
Grosbeaks in the Finch Family
Evening Grosbeak
Identification
Evening Grosbeaks are an extremely bright looking species. Males have electric yellow undersides, backs, and markings on their head just above the eye. They have black wings, a black tail, clean white wing patches, and an extremely thick bill. Females and immature birds are mostly gray with a yellow nape, black wings, and a black tail with white patches on them.
Range
The Evening Grosbeak’s range is somewhat misleading. They are year-round residents of Southern Canada and some parts of the Western United States. Most maps show their wintering range covering most of Michigan, Wisconsin, and New England, but through my experience, most winters Evening Grosbeaks only inhabit the most northern parts of these areas. Evening Grosbeaks do have years in which they fly farther South during winter but in recent years they have not irrupted in the same way that records from the past show. Additionally, the range of this species seems to be receding farther north into Canada each year.
Diet and Foraging Habits
Evening Grosbeaks have different diets depending on the time of year. During summer, they feed primarily on insects and other invertebrates, most notably spruce budworm larva. Other times of the year, Evening Grosbeaks eat various types of seeds including seeds from fruits.
Where to Find This Bird
Evening Grosbeaks can be found in conifer forests. They also can be found near bird feeders in their native range.
Grosbeaks in the Cardinal Family
Black-headed Grosbeak
Identification
Male Black-headed Grosbeaks have a black back and wings, a black tail, and a namesake black head. They show white spots on their wings and an orangey colored underside, making them look very distinctive. Females have a brown back and head along with a cream-colored eyebrow stripe. As opposed to the solid orange color of the males, females have a peach-colored wash on their undersides along with some thin striping.
Range
Black-headed Grosbeaks winter in Mexico. In spring, they expand north into the western half of the continental United States and southwestern Canada where they spend the summer.
Diet and Foraging Habits
Black-headed Grosbeaks have a varied diet that changes depending on the season. Their large bills make it easy for them to crush both seeds and nuts as well as insects and other invertebrates. In addition to those food items, they also eat many different types of fruits including poison oak, juniper berries, cherries, figs, and much more.
Where to Find This Bird
Black-headed Grosbeaks don’t necessarily have one specific preferred habitat but rather inhabit areas where multiple habitats come together. They aren’t typically found in unbroken stretches of habitat and seem to most likely occur in areas with tall trees and underbrush at least somewhat near water.
Blue Grosbeak
Identification
As their name suggests, male Blue Grosbeaks are a deep blue color. They have a gray bill, small black mask, and two rusty wing bars. Females and immature males are orangey brown with faint wing bars still visible.
Range
Blue Grosbeaks spend the winter in Central America and Mexico. Some of them stay in Mexico year-round while others move north into the United States where they can be found in the southern states as well as the Great Plains States for the duration of the summer.
Diet and Foraging Habits
Blue Grosbeaks eat a combination of insects and seeds. They will also eat other invertebrates such as spiders and snails.
Where to Find This Bird
Blue Grosbeaks are most at home in open areas such as scrub and desert. They are also fond of edge habitats where they can hide in trees and thickets while singing.
Rose-breasted Grosbeak
Identification
Rose-breasted Grosbeaks are dapper looking birds with a thick bill. Males have a black head, back, tail and wings with white markings also appearing on the wings. They have a white underside with their most noticeable feature appearing on their chest: A namesake bright red marking. Females have a mottled brown back with a yellowish underside and a white eye brow stripe.
Range
Rose-breasted Grosbeaks migrate annually from Northern South America, Central America, and Southern Mexico into the Eastern United States. In summer, they end up in the Northeastern U.S. and parts of Southern Canada.
Diet and Foraging Habits
Rose-breasted Grosbeaks feed on different food items depending on the time of the year. During spring and summer, insects make up a large portion of their diet. While in fall, berries and other fruits become more of a staple. They will also eat seeds and other plant matter.
Where to Find This Bird
Rose-breasted Grosbeaks live in a variety of habitats including deciduous and mixed conifer woods, forest edges, areas with streams and other water sources, and in backyards. They will also visit both seed and fruit bird feeders, so this is a species that can be attracted to parks, backyards, and nature centers.
Summary
Grosbeaks are beautiful and popular birds to both birders and backyard bird lovers. Knowing more about the species that are expected in your area can be instrumental in finding and identifying them, especially since they have such irregular migratory patterns. Hopefully, this article has helped to answer some questions about the grosbeaks of Iowa.
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