The dromedary is the tallest of the three camel species. Adult males range in height between at the shoulder; females range between . Males typically weigh between ; females range between . The distinctive features are its long, curved neck, narrow chest and single hump (the Bactrian camel has two), thick, double-layered eyelashes and bushy eyebrows. They have sharp vision and a good sense of smell. The male has a soft palate ( in Arabic) nearly long, which it inflates to produce a deep pink sac. The palate, which is often mistaken for the tongue, dangles from one side of the mouth and is used to attract females during the mating season.