eurasian curlew swallows a stone @ SBWR-26Sep2015

The lone Eurasian Curlew amongst the whimbrels did something strange in that it swallowed a small pebble. Perhaps this is to aid digestion in some way.

Why would a bird swallow a stone? and what is a gastrolith? ...and what possible link could this have to dinosaurs?
http://www.ucmp.berkeley.edu/taxa/verts/archosaurs/gastroliths.php
https://en.wikipedia.org/wiki/Gastrolith
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2197205/
http://www.dinosaurhunter.org/26-0-Gastroliths.html
http://www.backyardnature.net/birdguts.htm

Location : Sungei Buloh Wetland Reserve, Singapore.

eurasian curlew swallowing a stone @ SBWR - 26Sep2015 from SgBeachBum on Vimeo.

Find out more about the Eurasian Curlew :
http://www.birdlife.org/datazone/speciesfactsheet.php?id=3012
https://en.wikipedia.org/wiki/Eurasian_curlew
https://singaporebirdgroup.wordpress.com/tag/eurasian-curlew/
http://www.besgroup.org/2008/10/26/eurasian-curlew-at-sungei-buloh-wetland-reserve/
http://www.arkive.org/eurasian-curlew/numenius-arquata/
http://www.oiseaux-birds.com/card-eurasian-curlew.html
http://eol.org/pages/1049389/details

How do you tell a Eurasian Curlew apart from a Whimbrel?
http://shorebirdie.hubpages.com/hub/whimbrelvscurlew
https://books.google.com.sg/books?id=GANpBAAAQBAJ&pg=PA128&lpg=PA128&dq=eurasian+curlew+and+whimbrel&source=bl&ots=oPJPdSdo0q&sig=FsisRUVCczBUKW6VVUJlXxvGAZw&hl=en&sa=X&ved=0CEcQ6AEwCGoVChMIutaM46uWyAIVC1aOCh2gHQUG#v=onepage&q=eurasian%20curlew%20and%20whimbrel&f=false

a selection of birds 1 @ SBWR - 13Sep2015

A selection of birds digiscoped at Sungei Buloh Wetland Reserve on 13 Sep 2015.
a selection of birds 1 @ SBWR 13Sep2015 from SgBeachBum on Vimeo.

lesser sand plover (a.k.a mongolian sand plover)
http://www.naturia.per.sg/buloh/birds/Charadrius_mongolus.htm
http://www.birdlife.org/datazone/speciesfactsheet.php?id=3138
http://www.arkive.org/lesser-sand-plover/charadrius-mongolus/
http://www.iucnredlist.org/details/22693855/0
https://en.wikipedia.org/wiki/Lesser_sand_plover
http://www.wetlands.org/Portals/0/publications/Book/lesser%20sand%20plover.pdf
http://birdingfrontiers.com/2013/07/29/mongolian-lesser-and-greater-sand-plovers/

pacific golden plover
http://mangrove.nus.edu.sg/pub/wetlands/text/01-8-3-5.htm
http://www.naturia.per.sg/buloh/birds/Pluvialis_fulva.htm
https://en.wikipedia.org/wiki/Pacific_golden_plover
http://www.birdlife.org/datazone/speciesfactsheet.php?id=3112
http://www.audubon.org/field-guide/bird/pacific-golden-plover
http://www.xeno-canto.org/species/Pluvialis-fulva

marsh sand piper
http://www.naturia.per.sg/buloh/birds/Tringa_stagnatilis.htm
http://www.birdlife.org/datazone/speciesfactsheet.php?id=3018
http://www.oiseaux-birds.com/card-marsh-sandpiper.html
https://en.wikipedia.org/wiki/Marsh_sandpiper
http://www.birdsinbackyards.net/species/Tringa-stagnatilis
http://www.xeno-canto.org/species/Tringa-stagnatilis

grey-tailed tattler [- spotted by John A.]
http://www.birdlife.org/datazone/species/factsheet/22693289
https://en.wikipedia.org/wiki/Grey-tailed_tattler
http://www.birdsinbackyards.net/species/Tringa-brevipes
http://www.birdsindanger.net/pdfs/Grey-tailed%20Tattler.pdf
http://www.xeno-canto.org/species/Tringa-brevipes

common redshank
http://www.naturia.per.sg/buloh/birds/Tringa_totanus.htm
http://www.birdlife.org/datazone/species/factsheet/22693211
https://en.wikipedia.org/wiki/Common_redshank
http://www.oiseaux-birds.com/card-common-redshank.html
http://www.xeno-canto.org/species/Tringa-totanus

common greenshank
http://www.naturia.per.sg/buloh/birds/Tringa_nebularia.htm
http://www.birdlife.org/datazone/species/factsheet/22693220
https://en.wikipedia.org/wiki/Common_greenshank
https://www.audubon.org/field-guide/bird/common-greenshank

little egret
(links to be provided)