While American Oystercatchers may appear to lack sexual dimorphism at a glance, you can tell the sexes apart by looking closely at their eyes. Females have small, pigmented spots—or flecks—that stand out against their bright yellow irises. This is because of extra black pigment, and while not all females have them, they are a reliable indicator of sex for many individuals.
• Ostrero común
• American oystercatcher
Scientific classification:
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Charadriiformes
Family:Haematopodidae
Genus:Haematopus
Species:H. palliatus
Santa Mónica, Maldonado,
Uruguay
Camera: Canon EOS R7
Lens: Sigma 150-600mm F5-6.3 DG OS HSM | Contemporary
Capture Information:
Focal Length: 600.0 mm
Shutter Speed: 1/1000
Aperture: f/6.3
ISO: 125
Photo Taken: October 02, 2025
High resolution
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