traces of bird feet on the mud on the drying bottom of the kuyalnik estuary

anostraca artemia salina black silt branchiopoda crustacean curative ecology eggs europe fauna exoskeleton hydrobiology hypersaline invertebrate kuyalnik kuyalnitsky estuary landscape malacostraca mud nature odessa region organisms saline salt lake pools water salty shore sodium chloride therapeutic wildlife yellow footmarks seagull animal footprint foot bird trace coast