A Mallard duckling, Anas platyrhynchos, in Lincoln, Nebraska.
Spiny-tail fairy shrimp, shrimp (Streptocephalus sealii) at the Alabama Aquatic Biodiversity Center near Marion, Alabama.
A plumed worm (Diopara cuprea) at Gulf Specimen Marine Lab and Aquarium.
This creature builds elaborate casings covered in algae and bits of marine debris to serve as camouflage.
A pair of yellow casqued hornbills (Ceratogymna elata) at the Memphis Zoo.
This species is listed as vulnerable on the IUCN Red List.