Bird field guide · Thrushes

Photographing the Swainson's Thrush

How to photograph the Swainson's Thrush (Catharus ustulatus): the right lens for its size, shutter speeds for perched and moving animals, and when it's most often seen (May).

16–28 cm1/2500–1/3200 s
Swainson's Thrush (Catharus ustulatus)
Photo: © Alejandro Bayer Tamayo, some rights reserved (CC BY-SA) via iNaturalist
16–28 cm
Typical length (family range)
1/800 s
Shutter: perched / still
1/2500–1/3200 s
Shutter: action / flight
f/5.6–f/7.1
Aperture
29,371
Research-grade sightings in N. America
ModeManual + Auto ISOLock shutter & aperture, let ISO float
Shutter (still)1/800 s
Shutter (action)1/2500–1/3200 s
Aperturef/5.6–f/7.1
FocusAF-C + subject/eye detectionBird-eye AF with continuous focus (AF-C/AI Servo); fill at least a third of the frame.
DriveHigh-speed burst
Lens400–600 mmFull-frame equivalent

Focal length needed to frame it#

For a subject about 22 cm long filling a third or half of the frame width horizontally.

Distance⅓ of frame (FF)½ of frame (FF)⅓ of frame (APS-C)⅓ of frame (MFT)
5 m (16 ft)256 mm378 mm171 mm128 mm
10 m (33 ft)512 mm756 mm342 mm256 mm
15 m (49 ft)769 mm1,134 mm512 mm384 mm
20 m (66 ft)1,025 mm1,513 mm683 mm512 mm
30 m (98 ft)1,537 mm2,269 mm1,025 mm769 mm
50 m (164 ft)2,562 mm3,782 mm1,708 mm1,281 mm

When to find it#

Jan: 0% Jan Feb: 0% Feb Mar: 0% Mar Apr: 10% Apr May: 43% May Jun: 10% Jun Jul: 8% Jul Aug: 3% Aug Sep: 17% Sep Oct: 8% Oct Nov: 1% Nov Dec: 0% Dec
Share of iNaturalist observations by month across North America. Peak months: May.

About the Swainson's Thrush#

Swainson's thrush (Catharus ustulatus), also called olive-backed thrush, is a medium-sized thrush. It is a member of Catharus genus and is typical of it in terms of its subdued coloration and beautiful voice. Swainson's thrush was named after William Swainson, an English ornithologist.

Summary adapted from Wikipedia via iNaturalist (CC BY-SA 4.0).

Field-craft tips#

  • Lawns after rain are reliable for robins.
  • Bluebirds use nest boxes — keep a respectful distance during nesting.
  • Bird-eye AF with continuous focus (AF-C/AI Servo); fill at least a third of the frame.
  • Sightings peak in May, which is when you'll have the most chances.

Ethics#

  • The welfare of the animal comes first: if it changes its behaviour because of you, you are too close.
  • Stay on trails, respect closures around nests, leks, dens and haul-outs.
  • Avoid playback and baiting in sensitive seasons; never bait predators.
  • Don't share precise locations of rare, nesting or roosting animals publicly.

More Thrushes#

American Robin American RobinTurdus migratorius Eastern Bluebird Eastern BluebirdSialia sialis Western Bluebird Western BluebirdSialia mexicana Hermit Thrush Hermit ThrushCatharus guttatus Clay-colored Thrush Clay-colored ThrushTurdus grayi Mountain BluebirdSialia currucoides Wood Thrush Wood ThrushHylocichla mustelina Varied Thrush Varied ThrushIxoreus naevius

Frequently asked questions#

What lens do I need to photograph a Swainson's Thrush?

At about 22 cm long, a swainson's thrush fills a third of a full-frame image at 10 m with roughly 512 mm, or at 20 m with 1,025 mm.

What shutter speed should I use for a Swainson's Thrush?

1/800 s when it's still; 1/2500–1/3200 s for action.

When is the best time to photograph a Swainson's Thrush?

Observations in North America peak in May. Early morning and late afternoon give the best light and activity.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources