Captain Cottontail

I’ll start:

unlike rabbits, a baby hare can run, fight, or flee almost immediately after birth.

“they” is more inclusive than “he/she”

“themself” flows more naturally than “him or herself”

“they” is less clunky than “(s)he”

“I shouldn’t like to punish anyone, even if they’d done me wrong.” —George Eliot, The Mill on the Floss (1860)

“A person can’t help their birth.” —William Thackeray, Vanity Fair (1848)

“But to expose the former faults of any person, without knowing what their present feelings were, seemed unjustifiable.” —Jane Austen, Pride and Prejudice (1813)

“Every Fool can do as they’re bid.” —Jonathan Swift, Polite Conversation (1738)

“So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.” —King James Bible, Matthew 18:35 (transl. 1611)

“God send every one their heart’s desire!” —William Shakespeare, Much Ado About Nothing (~1600)

“Now this king did keepe a great house, that euerie body might come and take their meat freely.” —Sir Philip Sidney, the Arcadia (1580)

“If … a psalme scape any person, or a lesson, or els yt they omyt one verse or twayne…” —William Bonde, The Pylgrimage of Perfection (1526)

“And whoso fyndeth hym out of swich blame, / They wol come up and offre a Goddés name” —Geoffrey Chaucer, The Pardoner’s Tale (~1380)

“þan hastely hiȝed eche wiȝt on hors & on fote, / huntyng wiȝt houndes alle heie wodes, / til þei neyȝþed so neiȝh to nymphe þe soþe [Then hastily hied each person on horse and on foot / hunting with hounds all the high woods / ‘til they came so near, to tell the truth]” —William and the Werwolf (transl. ~1350-1375)

Violets are blue

Singular “they” predates

Texas kitten in snow

source:

https://www.nwf.org/Magazines/National-Wildlife/2012/AugSept/Animals/Bird-Vision