|"ThunderClan's second leader was a legendary hunter, who learned the ways of the tawny owl to stalk prey by night in silence."|
|— Description of Owlstar in Secrets of the Clans, page 22|
Owlstar was born as Owl Eyes to Turtle Tail and Tom along with Pebble Heart and Sparrow Fur, and was raised on the moor by his adopted father, Gray Wing. He eventually moved to the forest, where he joined Thunder in forming what would become ThunderClan. He became deputy after the death of Lightning Tail, and upon Thunderstar's death, the second leader of ThunderClan.
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- "Though [Gray Wing] had never had his own kits, Pebble Heart, Sparrow Fur, and Owl Eyes had seemed like his, and he still missed them now that they’d left the moor to live among the pines and the oaks. Yet he was proud that they’d followed their instincts and chosen their own homes."
- —Gray Wing on his adopted children Path of Stars, page 2
- Upon the news that Tom is in Clear Sky's group, Owl Eyes is shocked at the negative reaction, worrying that it must mean the other cats don't like him either. After Tom is killed by One Eye, he becomes despondent, feeling guilt when Gray Wing disappears after admitting he wasn't his real father. After the group is ordered by the spirit-cats to separate, Owl Eyes and Sparrow Fur join Clear Sky in the forest. However, Owl Eyes eventually decides to follow Thunder when the forest camp splits, and the group is named ThunderClan by Silver Stripe.
- In Thunderstar's Echo, Owl Eyes has trained an apprentice, Snail Shell. He is assigned to look after the Clan as temporary deputy when Thunderstar and Lightning Tail search for the dogs, but becomes full deputy after Lightning Tail's death.
- In Secrets of the Clans, he learns night hunting by watching the technique of an owl, becoming the best hunter in ThunderClan. He later becomes the second leader of ThunderClan after Thunderstar. He appears in StarClan at a meeting to discuss whether Bluefur was right to give up her kits.
- Owlstar is a is a lean, lithe, sleek, dark gray tom with large, unblinking, amber eyes, and broad shoulders.
- He was named for his owl-like eyes.
- Owl Eyes has the same lean, lithe shape as Turtle Tail.
- He has kittypet blood via Tom.
- He has been mistakenly called Owl Eye.
- In Secrets of the Clans, he is called an apprentice, despite never receiving the rank. 
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- The Best Fathers a Cat Could Have on the Warriors official website (Indirect mention only)
- Blood Isn't Everything on the Warriors official website (Indirect mention only)
- New In Store: Keychains on the Warriors official website (Indirect mention only)
- Stand Together or Fall Divided on the Warriors official website (Indirect mention only)
Notes and references
- ↑ 1.0 1.1 Revealed in Secrets of the Clans, page 76
- ↑ 2.0 2.1 2.2 2.3 Revealed in Thunder Rising, page 108
- ↑ Revealed in A Forest Divided, pages 48-49
- ↑ 4.0 4.1 Revealed in A Forest Divided, page 181
- ↑ Revealed in The First Battle, chapter 15
- ↑ Revealed in Path of Stars, pages 304-305
- ↑ 7.0 7.1 Revealed in Thunderstar's Echo, allegiances
- ↑ Revealed in Thunderstar's Echo, chapter 10
- ↑ 9.0 9.1 9.2 Revealed in Secrets of the Clans, page 11
- ↑ Revealed in Thunderstar's Echo, chapter 1
- ↑ 11.0 11.1 11.2 11.3 11.4 11.5 11.6 Revealed in Secrets of the Clans, page 22
- ↑ 12.0 12.1 Revealed in A Forest Divided, page 56
- ↑ Revealed in A Forest Divided, page 17
- ↑ Revealed in The Blazing Star, page 192
- ↑ Revealed in The Ultimate Guide, page 176
- ↑ Revealed in The First Battle, page 38