Syed Abdulla Hussain (13 August 1944 – 30 December 2009) was an Indian ornithologist. He is best known for the work he undertook at the Bombay Natural History Society (BNHS) along with Salim Ali. A species of frog Nyctibatrachus hussaini from Kudremukh near his home, was named after him but the species name later became embroiled in controversy.Hussain was born in Karkala, near Mangalore (then a part of the Madras Presidency) where his father was a noted lawyer.