Photo 3008682, (c) Nick Block, some rights reserved (CC BY), uploaded by Nick Block

Attribution © Nick Block some rights reserved Uploaded by nlblock Source iNaturalist Associated observations Photos / Sounds 2 photos What Masked Duck (Nomonyx dominicus) Observer nlblock Date December 21, 2004 Place Mad Island Marsh Preserve, TX (Google, OSM) Date Added February 13, 2016 01:58 PM EST 8 IDs Research Grade View Sizes small medium large original