Archived request from the wiki:

Bird call

• Family: Winds
• Description: a wooden, metal or clay whistle made to sound like a bird's song
• Appears on:
  1. Straight Outta Lynwood Played by Jon "Bermuda" Schwartz on track 5, credited as tin whistle
• Comments:
  • A duck call is a type of bird call. Maybe it should be filed under this when and if it gets added. – HibiscusKazeneko 04:41, 29 April 2013 (UTC)

Sometimes is made out of clay instead of metal or wood. Remains of bird call more popularly known as the bird whistle have been found in Indus valley civilization. Where children used them as toys.

https://www.mfa.org/collections/object/bird-whistle-18337

http://www.ancientindia.co.uk/indus/explore/dk_whistle.html

The ones made out of clay have a compartment which need to filled with water in order to make it sound like a bird.(I know this because I own one of these)

The pitch of the bird call is controlled by the amount of water added in the water container.

A bird call made of metal is depicted in above image.

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  The above images show a bird call made out of clay.