Bird field guide · Ducks, Geese, and Swans

Photographing the Mexican Duck

How to photograph the Mexican Duck (Anas diazi): the right lens for its size, shutter speeds for perched and moving animals, and when it's most often seen (April and May).

30–160 cm1/2000–1/3200 s
30–160 cm
Typical length (family range)
1/640 s
Shutter: perched / still
1/2000–1/3200 s
Shutter: action / flight
f/6.3–f/8
Aperture
14,096
Research-grade sightings in N. America
ModeManual + Auto ISOLock shutter & aperture, let ISO float
Shutter (still)1/640 s
Shutter (action)1/2000–1/3200 s
Aperturef/6.3–f/8
FocusAF-C + subject/eye detectionGet low to the water for an eye-level perspective; expose for bright plumage to avoid clipped whites.
DriveHigh-speed burst
Lens100–400 mmFull-frame equivalent

Focal length needed to frame it#

For a subject about 95 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)62 mm93 mm41 mm31 mm
10 m (33 ft)124 mm186 mm82 mm62 mm
15 m (49 ft)185 mm279 mm124 mm93 mm
20 m (66 ft)247 mm372 mm165 mm124 mm
30 m (98 ft)371 mm558 mm247 mm185 mm
50 m (164 ft)618 mm930 mm412 mm309 mm

When to find it#

Jan: 9% Jan Feb: 7% Feb Mar: 8% Mar Apr: 14% Apr May: 11% May Jun: 8% Jun Jul: 9% Jul Aug: 7% Aug Sep: 7% Sep Oct: 6% Oct Nov: 6% Nov Dec: 8% Dec
Share of iNaturalist observations by month across North America. Peak months: April and May.

Field-craft tips#

  • Winter is peak season for colourful drakes.
  • Morning side-light reveals iridescent head colours.
  • Get low to the water for an eye-level perspective; expose for bright plumage to avoid clipped whites.
  • Sightings peak in April and 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 Ducks, Geese, and Swans#

Mallard MallardAnas platyrhynchos Canada Goose Canada GooseBranta canadensis Wood DuckAix sponsa Bufflehead BuffleheadBucephala albeola Northern ShovelerSpatula clypeata Common Merganser Common MerganserMergus merganser American Wigeon American WigeonMareca americana Hooded Merganser Hooded MerganserLophodytes cucullatus

Frequently asked questions#

What lens do I need to photograph a Mexican Duck?

At about 95 cm long, a mexican duck fills a third of a full-frame image at 10 m with roughly 124 mm, or at 20 m with 247 mm.

What shutter speed should I use for a Mexican Duck?

1/640 s when it's still; 1/2000–1/3200 s for action.

When is the best time to photograph a Mexican Duck?

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

Sources & licences#

  • iNaturalist — Observation data CC BY-NC; photo licence as credited

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