Learn More About Nuisance Birds

Need to identify the species of your unwelcome visitor? Learn more about the specific types of nuisance birds in our bird pest library.

Bird Pest Library Menu:

> Pigeons

> Crows

> Cowbirds

> Starlings

> House Sparrows

> Woodpeckers

> Swallows

> Grackles

Pigeons and Rock Doves

 

The pigeon was introduced to the United States as a domesticated bird from the European Rock Dove. Many of the birds escaped and began forming into wild populations. Today, the pigeon is the most severe bird pest to the human population.

Behavior:
  • Pigeons stick together in large cities and may be seen congregating in flocks of hundreds on tall buildings. Smaller groups will take over a roof or two of a home, ledges, lofts, attics, drain spouts, and caves.
  • These birds do not construct a nest as other birds would. Instead, they gather twigs, sticks, and grasses and clump them together to form a platform like nest.
  • Feed on garbage, grain, and any other source of food that people may or may not intend to give them.
  • Pigeons are monogamous- they have one mate for life. The male will care for and guard the female and the nest. Young will hatch 18 days later and will leave the nest at 4-6 weeks of age.
Identifying Characteristics:

Typically, pigeons have grayish to black bodies with a whitish behind, two distinguishing black bands on the wings, and a broad black band on the tail. The head is usually a darker gray color with greenish-purple metallic coloring. A pigeon can weigh as much as 13 oz. and average length is 11 inches. The only bird that the pigeon can be confused with is the mourning dove, but the main distinguishing features is the tail; the mourning dove has a pointed tail, and the pigeon has a fanned tail.

pigeon
crow

Crows

Crows are familiar birds found across the continent. They are often found in treetops, roadsides, fields, town centers, and even beaches. These birds are most often the victims of West Nile Virus and will die within a week of having the virus.

Behavior:
  • Crows are very social birds and will hardly be found alone. Crows stick together in the winter and will have been known to stay in one are for well over 100 years causing mess problems in urban areas where people dwell.
  • Crows will eat anything: insects, earthworms, garbage, pet food, and roadkill…small turtles, fish, and clams. They are considered omnivores and will also eat small nestlings such as sparrows, chickens, jays, robins, and loons to name a few.
  • Female and male crows build nests together and hide then near the bottom of a tree trunk. Made with twigs, pine needles, weeds, and soft bark from trees; nests are large approximately 6-20 inches across and 4-16 inches deep. Eggs are grayish blue and have little spots of grey and brown.
  • Young crows do not begin mating until they are about 2-4 years old. Most times, these birds will work together to help raise younger crows in their group or family that may consist of 15 birds of which may have 5 different nests of young crows.
Identifying Characteristics:
    • Have a deep raspy cawing voice.
    • Large, black, intelligent birds with long black legs and a thick dark bill. They can appear to be grey when they molt, as they grow new shiny black feathers.
    • 16-21 inches in length with a wingspan of 34-40 inches; they are almost the size of a raven, weighing up to 22 ounces.

Cowbirds

 

Historically since the 1800s, cowbirds get their name from years of following bison as they roamed grasslands. Cowbirds would follow them to catch the food bison would kick up as they roamed. Today, cowbirds are seen following cattle in the same manner as the bison.

Fun Fact: Cowbirds are not called a flock of birds; they are called a herd of birds.

Behavior:
  • Cowbirds are most well-known and disliked because they are North America’s most common “nest parasite”. They do not build their own nests and care for their young, instead they lay their eggs in other small bird nests for that other species to care for the young. They lay their eggs in more than 220 species of birds.
  • Some birds can recognize the difference in eggs; therefore, they usually kick out they cowbird eggs, build new nest over the eggs; larger birds puncture holes in the eggs or throw them out of the nest. For the most part, many species do not recognize the difference in eggs.
  • Because cowbirds are nesting parasites, it is hard to figure out how social they are. They are not monogamous; in fact, the females have many different mates in a season.
Identifying Characteristics:
    • Males are small looking shiny black birds with a dull brown head. Females on the other hand, are much smaller than the male and are solid brown with a whitish throat.
    • Male: Length of the bird is 7.5-8.7 inches; weigh 1-2 oz with a wingspan of 14.2 inches
    • Female: Length 6-7.9 inches; weigh 1.3-1.6 oz with a wingspan of 15-12.6 inches.
cowbirds sitting on bison
Starling bird

Starlings

 

Originating from Europe, starlings were released throughout the city of New York in the early 1890s. An individual wanted to introduce all the birds that were mentioned in Shakespeare’s works to the United States. Today starlings have grown to be approximately 140 million in population throughout the states.

Behavior:
  • Starlings travel in flocks as pigeons and sparrows do. They nest in tree cavities, and ledges in rural areas.
  • They are a pest in grain fields, corn fields, and livestock feedlots; they can number in hundreds and thousands.
  • In cities, apartment buildings and parks are chosen areas for starlings to roost. In winter, they will flock to lighted signs and large buildings to keep warm.
  • Because they are so numbered, starlings create so much filth with their droppings that they can severely damage or even kill trees.
  • Starlings mate in the Springtime- females may lay 4-7 eggs that will hatch approximately 13 days later. When the young become 21 days old, they leave the nest. A female may lay two batches (or broods) per season.
Identifying Characteristics:

Starlings are about the size of a robin- they are stocky and have short tails. Most people confuse these birds with the blackbird, but the main difference is that they contain greenish purple metallic looking feathers within their body. Both female and male have a yellow beak as the black bird only during mating season, other time it is a dull dark color.

House Sparrow

 

The house sparrow has been around humans for centuries. In the 1850s, house sparrows were introduced in New York. Today the house sparrow can be found everywhere across North America, except Alaska and Northern Canada.

Behavior:
  • House sparrows are associated with people; in rural dry areas, they only survive around people. In other areas, they can be found in farms, cities, suburbs; they will not, however, be found in woodlands or grasslands.
  • Nest in holes of buildings, stuffing whatever materials they can find till the hole is practically filled. They also nest in streetlamps, traffic lights, and gas station roofs; making them a pest as they make messes with their droppings and nest materials.
  • Sparrows are very aggressive when it comes to building their nests. They will take over other nests of other species of birds.
  • House sparrows lay up to 8 eggs at a time- in approximately 14 days eggs will hatch.
  • They are often found at bird feeders- they are very social and will be found with other birds feeding on breadcrumbs and in farms, can be found partaking of chicken feed, corn, grains, and seeds.
Identifying Characteristics:
    • House sparrow can grow to be 5-7 inches in length and weigh approximately 1 oz.
    • Their wingspan can reach up to 10 inches in length
    • They are about the size of a song sparrow but are stockier than most of their species.
    • Males are often more colorful than females-males have a black patch along their throat. Females are often a grayish brown colored and are more “dingy” or rough looking than the male house sparrows.
House Sparrow bird
Woodpecker in a tree

Woodpeckers

 

There are approximately 22 species of woodpeckers in the United States. The Arizona woodpecker is found in mountains of New Mexico and Arizona. They inhibit oak, sycamores, and other woodlands in canyon areas.

Behavior:
  • Woodpeckers are monogamous, mate for life. Females lay 3-4 eggs in a nest that may range 9-50 feet high- made of woodchips. Both females and males incubate the eggs until babies hatch approximately 14 days later.
  • Most woodpeckers eat insects, nuts, seeds, vegetable matter, native berries, and some eat tree sap.
  • They find their shelter in man-made structures such as fences, utility poles, wood buildings because woodpeckers rely on wood; this occurs in most areas where trees may be scarce.
Identifying Characteristics:
    • Different woodpecker species may have different calls; most have rhythmic drumming pecking sequence to establish their territory and attract their mate.
    • The Arizona woodpecker is small with a brown body, a white spotted belly; the face is white with a brown patch on its cheek. Males have a small red patch on its head; females do not have the red mark.

Swallows

 

There are approximately 8 species of swallows commonly found in the United States. Swallows are widespread across North America and are often seen near open fields, bodies of water, agricultural areas, and residential structures. They prefer environments that provide open airspace for feeding and suitable surfaces for nesting.

Behavior:
  • Swallows are generally monogamous during the breeding season. Females typically lay 3–6 eggs per clutch. Nests are often built on man-made structures such as eaves, barns, bridges, and sheds, using mud, grass, and plant fibers. Both parents participate in incubating the eggs, which hatch in approximately 14–18 days.

  • Swallows feed almost exclusively on flying insects, including mosquitoes, flies, beetles, and gnats, making them effective natural insect control.

  • These birds are highly social and often nest in colonies. Their attraction to buildings is due to stable surfaces for nest attachment and protection from predators and weather.

Identifying Characteristics:
    • Swallows are small to medium-sized birds with streamlined bodies, long pointed wings, and forked or slightly notched tails designed for agile flight.

    • Plumage varies by species but commonly includes shades of blue, brown, white, and rust. Many species have lighter underbellies and darker backs.

    • Swallows are often identified by their fast, acrobatic flight patterns and continuous swooping movements while feeding on insects in midair.

swallows
grackle

Grackles

 

There are approximately 3 common species of grackles found throughout the United States. Grackles are widely distributed and adapt well to urban, suburban, and agricultural environments. They are commonly found in open fields, parks, parking lots, farmlands, and residential neighborhoods, especially near food sources.

Behavior:
  • Grackles are social birds and often form large flocks, particularly outside the breeding season. Females typically lay 4–7 eggs per clutch in nests built in trees, shrubs, or on man-made structures. Nests are made from grasses, twigs, and other plant material. Incubation lasts approximately 12–14 days.

  • Their diet is highly opportunistic and includes insects, seeds, grains, fruits, small animals, and human food scraps. This adaptability allows grackles to thrive near populated areas.

  • Grackles frequently roost in large numbers, which can lead to noise issues, droppings accumulation, and damage to property or landscaping.

Identifying Characteristics:
    • Grackles are medium to large birds with long legs, long tails, and strong bills.

    • Plumage is typically glossy black with iridescent blue, purple, or bronze tones, especially noticeable in sunlight.

    • Males are larger than females and have brighter iridescence. Grackles are often identified by their loud, harsh calls and their tendency to gather in noticeable flocks.

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