BjornIdle ,
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A Black Swan showing off the nictitating membrane in its eye as it searches for noms in the shallows

#BirdsOfMastodon #Birds #BlackSwan #Swan #Nature #NictitatingMembrane

Closeup of the head of a black swan, partly submerged as it roots around in the shallows for any morsels of food. The red eye closest to the camera has a translucent extra eyelid drawn halfway across it, just past the pupil. This would allow it to search with its head fully underwater without water getting into the eye socket itself.
ALT
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