Caspian terns observed at stream mouth, Rapanui at low tide.
My second close encounter of the year.
Reef heron observed initially on sand bank and then moved down to to reef. From the markings on legs, looks like the same heron as the one observed on 14 April (http://naturewatch.org.nz/observations/2932069). Video also available.
Chordates (/ˈkɔrdeɪts/) are animals possessing a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail for at least some period of their life cycles. Taxonomically, the phylum includes the subphyla Vertebrata, including mammals, fish, amphibians, reptiles, birds; Tunicata, including salps and sea squirts; and Cephalochordata, comprising the lancelets. Members of the phylum Chordata are bilaterally symmetric, deuterostome coelomates, and the vertebrate chordates display segmentation.