The mating season: Rosh HaShanah 11a
Animals' preference for shady locations in the heat of the day: Eruvin 43b
Mating time-of-day, by species, as indicative of when a mother will give birth: Beitzah 7a-b
Ants
Learning work ethic and integrity from ants: Eruvin 100b
Bats
Mating time-of-day and egg-laying times of bats: Beitzah 7a-b
Bears
Restlessness: Megillah 11a
Camels
Camels have short tails, allowing them to forage for the thorns they consume: Shabbat 77b
Chant to calm a camel: Pesachim 112b
Using a plaster of hardened honey: Shabbat 154b
Cats
Dangerous to let a cat drink blood: Shabbat 75b
Cats can drink liquids left uncovered overnight, because venom doesn't affect them: Shabbat 128b
The modest way in which cats excrete, and handle their excretion: Eruvin 100b
Cattle
An ox as it returns from a meadow, perhaps specifically a black ox during the Nisan season, is considered very dangerous: Pesachim 112b
A chant to calm an ox: Pesachim 112b
Oxen have long tails, to swat away flies: Shabbat 77b
Egyptian oxen were bred to have exceptionally wide bellies: Succah 21b
Eating their non-smooth meat, without salt, can cause bowel problems: Shabbat 81a
Cattle have no "Prozdor" [extended tunnel leading from the womb], so that Seed will not rot: Shabbat 86b
An ox will eat a donkey's uneaten food, but not the reverse: Shabbat 140b-141a
Cattle drool while eating: Shabbat 140b-141a
Cattle are picky about the cleanliness of their food: Shabbat 141a
Difference between the growth of a cow's horn, and that of other species: Rosh HaShanah 26a
The standard measure for a cow's size: Eruvin 19a-b
Crawling Creatures
8 crawling creatures whose skin is considered independent of their flesh: Shabbat 107a-b
Deer
Effect of exhaustion, vs. that of fever, on a deer: Shabbat 106b
"Chatzav" grass is deer fodder: Shabbat 128a
Dogs
Dogs sense food [Leaven], and will search for it, up to a depth of 3 Tefachim [Hand-Breadths]: Pesachim 31b, Bava Metzia 42a
A dog's taste in food: Shabbat 155b
Dogs and chickens hate each other: Pesachim 113b
The bite of a dog breaks flesh, not bone: Pesachim 49b
If one feeds a dog, it will follow him: Shabbat 155b
On the bite of a mad dog: Yoma 83b, 84a
Mad Dogs are considered especially dangerous creatures: Shabbat 121b
Dogs eat bones: Shabbat 128a-b
A dog's digestion takes 3 full days: Shabbat 155b
A dog which is out of its home territory will not bite: Eruvin 61a
Donkeys
The main weight of a donkey is on its rear legs: Shabbat 93b
The bite of a donkey breaks bone: Pesachim 49b
The bite of a white donkey is especially dangerous: Yoma 49a
An ox will eat a donkey's uneaten food, but not the reverse: Shabbat 140b-141a
Donkeys don't drool when eating: Shabbat 140b-141a
Donkeys are not picky about the cleanliness of their food: Shabbat 141a
Donkey being harmed by "Hevel," an invisible force related to heat or lack of proper ventilation: Bava Metzia 36b, 78a
Relative ability of donkeys to support pregnant or nursing riders: Bava Metzia 79b
Elephants
Elephants as creatures trained to perform a task without understanding it: Eruvin 31b
Elephants are frightened by mosquitoes which enter their noses: Shabbat 77b
Elephants eat bundles of vines: Shabbat 128a
Goats
Goats [which are usually black] travel before lambs, [usually white,] like Light preceded Darkness in Creation: Shabbat 77b
Goats don't have a protective tail-fat, just as their wool isn't used for protection [in clothing]: Shabbat 77b
Goats eat dry Turmus beans: Shabbat 126b
The normal flow of goat excrement: Taanit 9b
Horses
Horses love "adultery" and war, are high-spirited, rarely sleep, and excrete little in comparison with the amount they ingest: Pesachim 113b
Some say that horses attempt to kill their masters in war: Pesachim 113b
The main weight of horses is carried on the front legs: Shabbat 93b
Horses of "Bei Vayadan" which carried hunting birds: Shabbat 94a
Horses sleep in naps of sixty "breaths": Succah 26b
Lions
Lions' predatory and gastronomic habits: Bava Kama 16b
Lions are afraid of the "Mafgia," a small animal with a loud voice: Shabbat 77b
Chant to calm a lion: Pesachim 112b
Mice
Feeding Habits: Bava Metzia 40a
Monkeys
Monkey as creatures trained to perform a task without understanding it: Eruvin 31b; Zevachim 14a
Mules
The way in which mules excrete: Eruvin 100b
Pigs
Pigs strengthen as they Age: Shabbat 77b
Pigs will eat anything: Shabbat 155b
Pigs are presumed to have excrement or dirty material in their mouths: Berachot 25a (see Rashi "peshita")
Rodents
Rodents don't leave crumbs from their food: Pesachim 10b
Rodents do [not] take food from each other: Pesachim 10b
Sheep
Goats [which are usually black,] travel before lambs, [usually white,] like Light preceded Darkness in Creation: Shabbat 77b
Sheep have a protective tail-fat, just as their wool is used for protection: Shabbat 77b
Seasons of conception and birthing of Sheep: Rosh HaShanah 8a
Ewes have a narrow womb: Eruvin 54b
Snakes
How long they can become: Nedarim 25a
Whether snakes are generally striped on their belly or back: Nedarim 25a
Snakes strengthen as they Age: Shabbat 77b
Snakes won't drink from bubbling, fresh wine: Taanit 30a
After swallowing a snake: Shabbat 109b
Dealing with snake-bite: Shabbat 109b-110a
Dealing with a snake wrapped around one's leg: Shabbat 110a
Dealing with a snake which has become interested in you: Shabbat 110a
Dealing with a snake which is after you: Shabbat 110a
Special treatments for a woman dealing with a snake: Shabbat 110a
Israeli snakes are considered especially dangerous creatures: Shabbat 121b
Whether venom floats or mixes: Succah 50a
Whether serpents ever walked upright: Sotah 9b
Animals condemning the snake for attacking without hope of personal benefit: Taanit 8a
Miscellaneous
Spontaneous generation of red worms: Rashi Zevachim 22a "yavchushin"
Maturation of a "Tzavua" into a Bat into an "Arpad" into a "Kimosh" into a "Chuach" into a Shaid: Bava Kama 16a
Whether an animal is considered to carry itself, when it is being carried: Shabbat 94a
A mother animal can be made to have mercy on her child, by placing a piece of salt by the wound to remind her of the labor, and rubbing the placenta-juices on the child: Shabbat 128b
Kosher animals might abandon their children and come back; unkosher animals will not return if they abandon them: Shabbat 128b
An animal which survives for 8 days is considered viable: Shabbat 135b-136a
Animals are afraid of living creatures, but once someone dies the fear is gone: Shabbat 151b
Animals will be afraid of a human being, until he becomes like an animal to them: Shabbat 151b
Circulation of blood through the body: Rashi Zevachim 25b-26a "Shachat v'achar kach chatach"