Portal:Zoology

• "Zoology," in Encyclopædia Britannica (11th ed., 1911)
• "Zoölogy," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "The Source of Muscular Power" in Popular Science Monthly, 15 (October 1879)
• "Curious Ways of Getting Food" in Popular Science Monthly, 16 (April 1880)
• "The Diseases of Wild Animals" in Popular Science Monthly, 16 (November 1879)
• "Some Facts and Fictions of Zoology" in Popular Science Monthly, 17 (May 1880)
• "How Animals Eat" in Popular Science Monthly, 17 (June 1880)
• "Zoological Education" in Popular Science Monthly, 17 (September 1880)
• "How Animals Breathe I" in Popular Science Monthly, 20 (February 1882)
• "How Animals Breathe II" in Popular Science Monthly, 20 (April 1882)
• "Animal Self-Defense" in Popular Science Monthly, 21 (September 1882)
• "Speculative Zoology I" in Popular Science Monthly, 22 (December 1882)
• "Speculative Zoology II" in Popular Science Monthly, 22 (January 1883)
• "Queer Phases of Animal Life" in Popular Science Monthly, 22 (March 1883)
• "Defenses of the Lesser Animals" in Popular Science Monthly, 24 (February 1884)
• "Marey's New Results in Animal Movements" in Popular Science Monthly, 6 (February 1875)
• "Voice in Man and in Animals I" in Popular Science Monthly, 9 (August 1876)
• "Voice in Man and in Animals II" in Popular Science Monthly, 9 (September 1876)
• "Animal Powers of Offense and Defense" in Popular Science Monthly, 9 (July 1876)
• "The Introduction of Domestic Animals" in Popular Science Monthly, 21 (June 1882)
• "Freezing of Plants and Animals" in Popular Science Monthly, 3 (May 1873)
• "Symbiosis and Vegetating Animals" in Popular Science Monthly, 23 (October 1883)
• "Animal Parasites and Messmates" in Popular Science Monthly, 8 (April 1876)
• "Darwin and Zoology" in Popular Science Monthly, 74 (April 1909)
• The Babyhood of Wild Beasts, 1917 by Georgia McNally

• "Zoological Distribution," in Encyclopædia Britannica (11th ed., 1911)
• "Introduction and Succession of Vertebrate Life in America I" in Popular Science Monthly, 12 (March 1878)
• "Introduction and Succession of Vertebrate Life in America II" in Popular Science Monthly, 12 (April 1878)
• "The Plant-Eaters of North America" in Popular Science Monthly, 10 (April 1877)
• "Cattle-Raising in South America" in Popular Science Monthly, 19 (October 1881)
• "Observations of a Naturalist in Nicaragua" in Popular Science Monthly, 5 (May 1874)
• "Animal Life in Madagascar" in Popular Science Monthly, 7 (October 1875)

• "Arthropoda," in Encyclopædia Britannica (11th ed., 1911)
• "Arthropoda," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)

Spiders, Mites, and Scorpions

• The Life of the Spider (1912)
• "Arachnida," in Encyclopædia Britannica (11th ed., 1911)
• "Spiders," in Encyclopædia Britannica (11th ed., 1911)
• The Salticidae (Spiders) of Panama
• "The Triangle Spider" in Popular Science Monthly, 6 (April 1875)
• "As Regards Spiders" in Popular Science Monthly, 1 (October 1872)
• "My Spider" in Popular Science Monthly, 21 (August 1882)

• "About Crabs" in Popular Science Monthly, 5 (June 1874)
• "The Crayfish" in Popular Science Monthly, 16 (April 1880)

• Portal:Insects

Centipedes and Millipedes

• "Myriapoda," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Myriapods" in Popular Science Monthly, 9 (September 1876)
• "Centipede," in Encyclopædia Britannica (11th ed., 1911)
• "Millipede," in Encyclopædia Britannica (11th ed., 1911) (also covers Pauropoda and Symphyla)

• "On Certain Points in the Anatomy and Physiology of the Dibranchiate Cephalopoda" by Albany Hancock in Natural History Review, Series 2, 1 (4) (1861), pp. 473–484
• "The Past and Present of the Cuttle-Fishes" in Popular Science Monthly, 21 (October 1882)
• "The Mollusks of the Rocky Mountains" in Popular Science Monthly, 9 (May 1876)
• "Capture Among the Mollusks" in Popular Science Monthly, 17 (May 1880)
• "Deterioration of American Oyster-Beds I" in Popular Science Monthly, 20 (November 1881)
• "Deterioration of American Oyster-Beds II" in Popular Science Monthly, 20 (December 1881)
• "Longevity of the Oyster" in Popular Science Monthly, 20 (February 1882)
• "Cuttle-fish," in Encyclopædia Britannica (11th ed., 1911)
• "Cephalopoda," in Encyclopædia Britannica (11th ed., 1911)
• "Mollusca," in Encyclopædia Britannica (11th ed., 1911)
• "Abalone," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Mussel," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Quahaug," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• New land mollusks from Madagascar and Mexico (1961)

• "Guinea-Worm," in Encyclopædia Britannica (11th ed., 1911)
• "Nematoda," in Encyclopædia Britannica (11th ed., 1911)
• "Oxyuris," in The New International Encyclopædia, New York: Dodd, Mead and Co. (1905)
• "On Sphærularia Bombi" by John Lubbock in Natural History Review, Series 2, 1 (1) (1861), pp. 44–57

• "Earthworm," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Earth-Worms and their Wonderful Works" in Popular Science Monthly, 20 (January 1882)
• "Echinodermata," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Observations on some Australian and Feegeean Heterocyathi and their Parasitical Sipunculus" by John Denis Macdonald in Natural History Review, Series 2, 2 (5) (1862), pp. 78–81
• "Starfish," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)

• Portal:Birds
• Portal:Mammals
• Portal:Dinosaurs
• "Bird or Reptile-Which?" in Popular Science Monthly, 13 (October 1878)
• "Man and the Vertebrate Series" in Popular Science Monthly, 18 (April 1881)
• "Progress of the Backboned Family" in Popular Science Monthly, 22 (April 1883)

• "On an Organ in the Skate which appears to be the homologue of the Electrical Organ of the Torpedo" by Robert McDonnell in Natural History Review, Series 2, 1 (1) (1861), pp. 57–60
• "Clever Fishes" in Popular Science Monthly, 1 (September 1872)
• "About Sharks" in Popular Science Monthly, 10 (January 1877)
• "Odd Forms Among Fishes" in Popular Science Monthly, 11 (September 1877)
• "The Archer-Fishes" in Popular Science Monthly, 12 (January 1878)
• "The Teredo and its Depredations I" in Popular Science Monthly, 13 (August 1878)
• "The Devil-Fish and its Relatives" in Popular Science Monthly, 14 (January 1879)
• "The Migrations of Fishes" in Popular Science Monthly, 18 (December 1880)
• "The Herring" in Popular Science Monthly, 19 (August 1881)
• "Story of a Salmon" in Popular Science Monthly, 19 (May 1881)
• "The Sirens of the Sea" in Popular Science Monthly, 20 (March 1882)
• "Dr Gunther on the Study of Fishes" in Popular Science Monthly, 21 (July 1882)
• "The Eye-Like Organs of Fishes" in Popular Science Monthly, 21 (June 1882)
• "A Wonder from the Deep-Sea" in Popular Science Monthly, 23 (May 1883)
• "The Borers of the Sea" in Popular Science Monthly, 3 (May 1873)
• "The Growth of Salmon" in Popular Science Monthly, 4 (November 1873)
• "The Shovel-Nosed Shark" in Popular Science Monthly, 4 (November 1873)
• "The Chromis Pater-Familias" in Popular Science Monthly, 9 (July 1876)
• "Amphibious Fishes" in Popular Science Monthly, 9 (September 1876)
• The Fresh Water Fishes of New England by Edward Knobel, illustrated by Edward Knobel (1896)

• The Osteology of the Reptiles by Samuel Wendell Williston, ed. by William K. Gregory (1925)

• "Alligator," in Encyclopædia Britannica (11th ed., 1911)
• "Crocodile," in Encyclopædia Britannica (11th ed., 1911)
• "Gecko," in Encyclopædia Britannica (11th ed., 1911)
• "Iguana," in Encyclopædia Britannica (11th ed., 1911)
• "Lizard," in Encyclopædia Britannica (11th ed., 1911)
• "Reptiles," in Encyclopædia Britannica (11th ed., 1911)
• "Snakes," in Encyclopædia Britannica (11th ed., 1911)
• "Tortoise," in Encyclopædia Britannica (11th ed., 1911)
• "Alligator," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Anaconda," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)

• "On Gigantic Land-Tortoises and a small Freshwater Species from the Ossiferous Caverns of Malta" by Andrew Leith Adams in Quarterly Journal of the Geological Society of London, 33 (1877), pp. 177–191

• "Observations on the Chameleon" in Popular Science Monthly, 15 (June 1879)
• "Serpent-Charm" in Popular Science Monthly, 15 (September 1879)
• "Concerning Serpents" in Popular Science Monthly, 4 (January 1874)
• "Chameleons—Their Habits and Color-Changes" in Popular Science Monthly, 6 (March 1875)
• "The Horned Frog" in Popular Science Monthly, 2 (April 1873)
• "The Psychology of Lizards" by Joseph Rémi Léopold Delboeuf in Popular Science Monthly, 43 (September 1893)
• "Affections and Jealousies of Lizards" by Joseph Rémi Léopold Delboeuf in Popular Science Monthly, 50 (January 1897)

• "Notes on the Anatomy of the Alimentary System of the Axolotl (Siredon Mexicanum)" in Natural History Review, Series 2, 1 (1) (1861), pp. 60–67
• "Amphibia," in Encyclopædia Britannica (11th ed., 1911)
• "Axolotl," in Encyclopædia Britannica (11th ed., 1911)
• "Frog," in Encyclopædia Britannica (11th ed., 1911)
• "Newt," in Encyclopædia Britannica (11th ed., 1911)
• "Salamander," in Encyclopædia Britannica (11th ed., 1911)
• "Toad," in Encyclopædia Britannica (11th ed., 1911)
• "Amphibia," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Newt," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• The turtles, snakes, frogs and other reptiles and amphibians of New England and the north by Edward Knobel, (1899)
• The return of red-legged frogs - US Fish & Wildlife Services (2021)

• "Strange Animal-Friendships" in Popular Science Monthly, 14 (December 1878)
• "A Roguish Household Pet" in Popular Science Monthly, 16 (January 1880)
• "Wild Animals as Man's Associates" in Popular Science Monthly, 20 (February 1882)
• "What May Animals Be Taught?" by Joseph Rémi Léopold Delboeuf in Popular Science Monthly, 29 (June 1886)
• "The Psychology of Lizards" by Joseph Rémi Léopold Delboeuf in Popular Science Monthly, 43 (September 1893)
• "Affections and Jealousies of Lizards" by Joseph Rémi Léopold Delboeuf in Popular Science Monthly, 50 (January 1897)

• "Canine Sagacity" in Popular Science Monthly, 10 (December 1876)
• "Instinct and Intelligence" in Popular Science Monthly, 11 (September 1877)
• "Animal Intelligence" in Popular Science Monthly, 14 (December 1878)
• "The Moral Sense in the Lower Animals" in Popular Science Monthly, 16 (January 1880)
• "Mental Capacity of the Elephant" in Popular Science Monthly, 23 (August 1883)
• "A Superstitious Dog" in Popular Science Monthly, 23 (May 1883)
• "How Much Animals Know" in Popular Science Monthly, 23 (May 1883)
• "The Survival of Instincts" in Popular Science Monthly, 4 (November 1873)
• "Are Animals Automatons?" in Popular Science Monthly, 5 (October 1874)
• "Conscience in Animals" in Popular Science Monthly, 9 (May 1876)
• "On the Aesthetic Sense in Animals" in Popular Science Monthly, 4 (April 1874)
• "Nature of the Invertebrate Brain I" in Popular Science Monthly, 9 (October 1876)
• "Nature of the Invertebrate Brain II" in Popular Science Monthly, 10 (November 1876)

In biology, morphology is a branch of bioscience dealing with the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, colour, pattern) as well as the form and structure of the internal parts like bones and organs. This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of gross structure of an organism or Taxon and its component parts."Morphology (biology)," in Wikipedia, the Free Encyclopedia

"Anatomy" is the study of the form and structure of internal features of an organism."Morphology (biology)," in Wikipedia, the Free Encyclopedia

• Illustrations of the comparative anatomy of the nervous system (1835) (transcription project)
• "Natural Trumpet of the Crane" by Francis Trevelyan Buckland in Popular Science Monthly, 9 (June 1876)
• "Why the Eyes of Animals Shine in the Dark" in Popular Science Monthly, 24 (April 1884)

"Eidonomy" is the study of the form and structure of the external features of an organism."Morphology (biology)," in Wikipedia, the Free Encyclopedia

• "Furs and their Wearers" in Popular Science Monthly, 4 (December 1873)
• "Color in Animals" in Popular Science Monthly, 5 (August 1874)
• "A Feather" by William Keith Brooks in Popular Science Monthly, 4 (April 1874)
• "Birds with Teeth" by Otto Meyer in Popular Science Monthly, 36 (January 1890)
• "Ear," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)
• "Nose," in The New Student's Reference Work, Chicago: F.E. Compton and Co. (1914)

• The Black Cat
• The Cat Came Back
• The Cat That Walked by Himself
• Cat and Mouse in Partnership
• The Cat and Venus
• The Cat and the Birds
• Cats and Dogs
• The Cats of Ulthar
• The Fox and the Cat (Grimm)

• Black Bess by Eliza Cook

• Portal:Animal biographies