The smallest pest bird species, house sparrows, are approximately 14 cm to 18 cm long with a wingspan of 19 cm to 25 cm. At the other end of the spectrum, Canadian geese boast a wingspan as long as 182 cm and range from 90 to 120 cm in length.

Some of the most common bird colourations include shades of grey, white, black, and brown. Pigeons may appear with streaks of light blue, green, lilac, peach, and various other shades.

Six types of birds found in Canada can be classified as nuisance pests: house sparrows, starlings, pigeons, woodpeckers, gulls, and Canada geese