Princeton's WordNet(3.00 / 1 vote)Rate this definition: 1  opacity(noun) the phenomenon of not permitting the passage of electromagnetic radiation. 2  opacity, opaqueness(noun) incomprehensibility resulting from obscurity of meaning.
The Oystercatcher is a species of bird that lives around Europe and Asia. They usually eat shellfishes that are found on beaches and mud.The Eurasian Oystercatcher uses its sharp bill to open the shells of oysters and mussels.It cuts the muscle between the two halves of the shell together, or it crashes the shell against a rock and eats the oyster inside.ith bills like that, oystercatchers are dangerous opponents for other birds. They can fight off predators, and often raid other birds to steal their catches. They attack other birds at an average of five-minute intervals during low tide. They get as much as 60% of their food by theft.
The American Oystercatcher (Haematopus palliatus) is listed as a species of special conservation concern. This species is considered to be in decline in New Jersey.If you spend time along the New Jersey coast, thereâs a good chance you have seen or heard an American oystercatcher. Standing nearly a foot and a half tall with a long orange-red bill, the stocky black, brown, and white oystercatcher is not easily overlooked.nce abundant along the entire Atlantic coast, oystercatchers were believed to be extirpated in the Northeast as a result of intensive market hunting and egg collecting in the 1800âs. With the passage of the Migratory Bird Treaty Act of 1918, the oystercatcher began to rebound.