Northern Mockingbird (Mimus polyglottos)

One of the ultimate imitators, the Northern Mockingbird is able to imitate not only the songs of many species of birds, but may sometimes repeat other sounds from the meow of a cat to the tinkle of wind chimes. The Northern Mockingbird is a bold defender of its nest site, attempting to chase away anything (including people) that come too close for its comfort. South Dakota is at the northern edge of its range, although it has been expanding its range to the north in recent decades. They are increasingly rare as one moves northward from the Nebraska/South Dakota border.

Habitat

Northern Mockingbirds can be found in a variety of habitats, but prefer mixed habitats with open ground and dense thickets and shrubs, including fencerows, riparian areas, residential areas, and roadsides.

Diet

Mostly insects and fruit. The diet in the summer generally primarily consists of animal protein, particularly while raising young. Opportunists, their protein-based diet may also include earthworms, snails, small crustaceans, and small vertebrates such as amphibians and lizards. The diet outside the breeding season may shift to a heavier proportion of vegetable matter.

Behavior

Does much of its foraging by walking on the ground. Will also observe from a perch and fly out to capture insects spotted on the ground or in vegetation below.

Nesting

June and July. Northern Mockingbirds may nest in a variety of shrubs and trees, generally 5 to 10 feet from the ground but sometimes much higher. The male initiates breeding by typically constructing multiple "starter nests", letting his mate choose the nest site she deems most suitable. The male's starter nest is a loose construction of twigs, which the female then firms up and develops into a cup, lined with finer material that may include almost any vegetative or other material near the nest site, including grasses, roots, weed stems, hair, feathers, or bits of man-made material. The female lays between 3 and 12 eggs, with she alone incubating them. The young hatch after about 12 to 14 days, with both parents helping to feed them. However, Northern Mockingbirds sometimes produce more than one brood per breeding season, and the female may leave the first nest while the young still haven't fledged, finishing another of the male's starter nests, laying new eggs, and initiating a 2nd brood. The male finishes raising the first brood's young in this situation.

Songs / Calls

As the name implies, Northern Mockingbirds are incredibly skilled vocalists, capable of an extremely wide array of calls and songs. The typical song of a Northern Mockingbird is a long series of varied phrases, with each phrase often repeated 2 or 3 times, and then a slight pause as they shift to a different phrase. Given Northern Mockingbirds can provide calls that sounds like whistles, musical warbling, nasal whining, harsh chattering, and a variety of other sounds, the songs and vocalizations can be unpredictable and even vary widely between birds found in the same area. That unpredictability becomes even more pronounced given that Northern Mockingbirds often learn the songs of the birds around them, or even the vocalizations of frogs and other animals.

Here are some example vocalizations of a Northern Mockingbird:

Migration

Generally a permanent resident throughout its range, with some northern birds moving south in the fall.

Interactive eBird Map

Click here to access an interactive eBird map of Northern Mockingbird sightings

Bird Feeders

Northern Mockingbirds will sometimes attend feeders for fruit, suet, and bread.

Similar Species

Size and structure differentiate the Northern Mockingbird from some other "gray" songbirds, but there are a few species that might possible cause some identification challenges in the normal range of the species:

Townsend's Solitaire - Townsend's Solitaire have a broad range in western North America, where they may cross paths with Northern Mockingbird. In South Dakota, they are permanent residents in higher-elevation parts of the Black Hills, but are winter visitors elsewhere. In terms of appearance, Townsend's Solitaire are grayish overall with darker wings. However, unlike a Northern Mockingbird, they have an obvious white eye-ring, and have more consistent gray coloring on both their upperparts and underparts, compared to the darker upperparts and lower upperparts of the Mockingbird. Wings are also different, as Townsend's Solitaire have plainer looking wings without the white wing bars of a Northern Mockingbird. Finally, the bill of a Townsend's Solitaire is noticeably smaller and straighter than that of a Northern Mockingbird.
Gray Catbird - Gray Catbirds have a broad range in North America and cross paths with the Northern Mockingbird in parts of the western US in the summer months. Gray Catbirds have an obvious black cap and a rusty undertail coloring that are both lacking on a Northern Mockingbird. Conversely, Northern Mockingbirds have black on the wings with white wingbars, both features lacking on a Gray Catbird.


Townsend's Solitaire	Townsend's Solitaire	Gray Catbird	Gray Catbird

Conservation Status

Northern Mockingbirds were once captured for the pet trade, and wild populations sharply declined. Numbers have increased since then, and systematic surveys over the last few decades show generally stable populations. There are some indications that they are now expanding their range to the north as well. Overall, they are found across a very broad geographic area, are common in parts of that range, and overall numbers are strong. The IUCN considers the Northern Mockingbird to be a species of "Least Concern".

Photo Information

March 26th, 2009 - Henderson Bird Viewing Preserve, Henderson, Nevada -- Terry L. Sohl

Audio File Credits

¹William Whitehead. Recorded in Monmouth County, New Jersey on October 23rd, 2020. Original recording and information available from xeno-canto.
²Isain' Contreras Rodriguez. Recorded in Sinaloa, Mexico on February 26th, 2020. Original recording and information available from xeno-canto.
³JL Guerra. Recorded in Cuba on September 17th, 2019. Original recording and information available from xeno-canto.
⁴Omar Suarez Garcia. Recorded in Oaxaca, Mexico on September 23rd, 2018. Original recording and information available from xeno-canto.
⁵Manuel Grosselet. Recorded in Nuevo Leon, Mexico, on May 14th, 2017. Original recording and information available from xeno-canto.