This is curdled by calcium sulphate, or by a traditional curdling agent called nigari in Japan; this is bittern , the lye left over after the crystallization of salt from sea water.
The bittern 's diet includes fish, amphibians, insects, worms, small mammals and even young birds.
Stretch your legs and breathe in some crisp seasonal air on a winter walk around the beautiful RSPB Leighton Moss Nature Reserve in search of the elusive bittern , next Wednesday at 10.30 am.
An expert warden will be on hand to help you find the elusive bittern and then it's back to the tearoom for a hearty bowl of soup.
A new process for recovery of Low Sodium Salt from bittern has been described in the present invention.
The RSPB and English Nature revealed that bittern numbers have increased five fold in just seven years.
The bittern , a brown heron, came close to dying out six years ago and conservationists feared there were only 11 ‘booming’ males left.
The bittern is one of the most threatened species in Britain - there are only 22 known pairs in the country.
Public viewing hides at the reserve and on the shores of the Bay offer glimpses of the rare bearded tit and bittern .
It is part of a £4m project, half of which has come from the European Union, which will see bittern habitat developed at 19 sites throughout England.