Chennai Snake Park snake, annulated sea snake, common wolf snake, common vine snake, striped keelback, checkered keelback, olive keelback, common trinket snake, spectacled cobra, banded sea krait and hook-nosed sea snake. Crocodilian species include the gharial, marsh crocodile, saltwater crocodile, Siamese crocodile, African dwarf crocodile, Nile crocodile and spectacled caiman. Other reptiles at the park include water monitor, Bengal monitor, Indian black turtle, Indian flapshell turtle, Indian star tortoise, spotted rock gecko and South Asian chamaeleon. The snakes are housed in glass-fronted enclosures and the crocodilians and the larger lizards are housed in open-air enclosures protected by parapet walls and wire mesh. The
Banded penguin and emotional state. Agonistic calls are vocalizations used when a banded penguin is demonstrating agonistic behaviour, which is characterized by aggressive interactions or fighting. Typically, banded penguins vocalize agonistic calls when defending a territory, such as their nest, against conspecifics. For nesting penguin species, such as banded penguins, the mating pair and their offspring are the only individuals allowed on their nest. Thus, any conspecific from the large colony that intrudes this territory will be a threat and a agonistic call will be produced. There are two types of display songs vocalized by banded penguins; ecstatic display songs and mutual