Merlin vs Prairie Falcon

In short

Merlins and Prairie Falcons are both small falcons, but they differ in habitat preference and plumage details. Merlins are more compact with a broader chest, while Prairie Falcons are slightly larger and more slender. Key differences include the facial markings and underwing patterns.

Identification tips

1. Facial Markings: Look for the more pronounced mustache stripe on the Prairie Falcon. 2. Underwing Pattern: Prairie Falcons have dark axillaries, visible in flight. 3. Habitat: Consider the environment; Merlins are more likely in wooded areas, Prairie Falcons in open, arid regions. 4. Size and Shape: Note the Merlin's compact build versus the Prairie Falcon's slender form.

Size

The Merlin is smaller and more compact, while the Prairie Falcon is slightly larger and more slender.

Plumage

Merlins have a more uniform dark plumage with a faint mustache stripe, whereas Prairie Falcons have a distinctive dark 'mustache' stripe and pale underparts with dark axillaries (armpits) visible in flight.

Behaviour

Merlins are agile and often seen hunting in open areas or perching on low trees, while Prairie Falcons are more likely to be seen soaring or perched on cliffs.

Habitat

Merlins prefer open woodlands and forest edges, while Prairie Falcons are typically found in arid, open landscapes such as deserts and grasslands.

Voice

Merlins have a rapid, chattering call, whereas Prairie Falcons produce a series of harsh, repetitive 'kek-kek-kek' sounds.