Because He is the lord of all creatures!
Lord Shiva wears a snake around his neck, the type of snake is a cobra usually cobras are related to toughness and Shiva is the destroyer of Hindu Gods.
The name of snake around Lord Shiva's neck is Vasuki.
naagraj or naag devta
lord shiva has a human body with a blue neck since in the ramaine he swallowed poison
Saiva Mudaliars are a community of Tamil Nadu who traditionally follow Saivism and worship Lord Shiva. While they may also revere other Hindu deities, their primary focus is typically on Shiva rather than Venkateshwara.
Its called hood.
The hood.
the size of their neck is 5milo meters long
Lord Krishna is shown in bluish-blackish colour. Represents the colour of clouds. Lord Shiva has a blue neck. This is on account of drinking poison during the samudra manthan (churning of the sea).
The Hindu God Shiva is often depicted in many colors that represent many aspects his personality. However, the most common color he is depicted as is blue which represents the color of the deity.
Cobras have a distinct inflated (wider) neck region.
When threatened, most members of the cobra family can expand their neck ribs to form a widened hood in a characteristic threat display. The name cobra comes from the Portuguese phrase cobra de capelo, which means snake with hood.