Feral pigeon in the context of "Dove"

The peregrine falcon (Falco peregrinus), also known simply as the peregrine, is a cosmopolitan bird of prey (raptor) in the family Falconidae renowned for its speed. A large, crow-sized falcon, it has a blue-grey back, barred white underparts and a black head. As is typical for bird-eating (avivore) raptors, peregrine falcons are sexually dimorphic, with females being considerably larger than males. Historically, the bird has also been known as the "black-cheeked falcon" in Australia, and the "duck hawk" in North America.

The breeding range includes land regions from the Arctic tundra to the tropics. It can be found nearly everywhere on Earth, except extreme polar regions, very high mountains, and most tropical rainforests. The only major ice-free landmass from which it is entirely absent is New Zealand. That makes it the world's most widespread raptor and one of the most widely found wild bird species. In fact, the only land-based bird species found over a larger geographic area, domestic and feral pigeons, owe their success to human-led introduction. Both are domesticated forms of the rock dove, and are a major prey species for peregrine populations. Due to their greater abundance in cities than most other birds, feral pigeons support many peregrine populations as a staple food source, especially in urban settings.

The rock dove (Columba livia), also known as the rock pigeon or common pigeon, is a member of the bird family Columbidae (doves and pigeons). In common usage, it is often simply referred to as the "pigeon", although the rock dove is the wild form of the bird; the pigeons familiar to most people are the domesticated forms of the wild rock dove.

Wild rock doves are uniformly pale grey with two black bars on each wing, with few differences being seen between males and females; i.e. they are not strongly sexually dimorphic. The domestic pigeon, often, but invalidly, called "Columba livia domestica", which includes about 1,000 different breeds, is descended from this species. Escaped domestic pigeons are the origin of feral pigeons around the world. Both forms can vary widely in the colour and pattern of their plumage unlike their wild ancestor, being red, brown, checkered, uniformly coloured, or pied.

The Toural Square (Portuguese: Largo do Toural), commonly referred as just Toural, is the most important square and place of gathering on the Portuguese city of Guimarães. It began in the 17th century as a place to sell bulls (Touro in Portuguese), oxen and other goods. Unlike the rest of the city, pigeons aren’t commonly found in the Toural, but swallows are.