Many birds, including chickens, have a gizzard, and swallow small stones to help them grind up food. Crocodilians also use stones to aide in digestion.
Emus are omnivores, and they will eat anything that is remotely edible, including some things which are not. They are very curious birds that will try almost anything, using their large beaks to peck at and pick up food. Commonly, they eat insects, caterpillars, grubs and other invertebrates; seeds, nuts, flowers, young leaves and other plant parts; lizards, other small animals and even animal droppings. They do not eat dry grasses or older leaves, even if that's all that is available to them. They are more likely to move on to other food sources. Emus will swallow quite large stones and charcoal to help them grind up and digest their food.
A young swallow is called a fledgling. This term refers to a young bird that has recently acquired its flight feathers and is learning to fly.
Crocs don't chew their food, they rip out lumps that they swallow. The stones help grind up the food in the stomach.
The swallow carried the jewel to the young poet because the swallow had empathy for the poet's suffering and wanted to help him. The swallow saw the poet's kindness and selflessness despite his own difficulties, and he wanted to express gratitude and offer assistance in return.
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The cast of Creature - 2012 includes: Angus McNeil as Young Man
Hawks feed their young in the same way that other birds feed their young. They digest the food and spit it into their young's mouth.
Metamorphosis
A young opossum is called a joeyA kit or kitten is also an acceptable term of reference for any young furry creature.
Young Samson and Goliath - 1967 The Colossal Coral Creature 1-14 was released on: USA: 9 December 1967
In a word, ballast. They use the stones to help them sink to the bottom of the river, pond, or wherever they are living.