- Red-Rumped Agouti
The Agouti are now small or small groups united in forest-rich plains, especially in the densest forests of the river valleys; some are in the mountains up to an altitude of 2000 M. - red-stalked dogwood
- Red-tailed Hawk
Red-tailed Hawk Red-tails, like other hawks, show a great variation in plumage. The dark phase of a Western Red-tail compares favorably with the plumage of an adult Golden Eagle, but the smaller size and the reddish upper tail surface which reflects the sun as the bird soars, furnishes the clue. Typical plumage shows a dark belly-band with bright, reddish upper tail, while some birds show a light breast and belly. This bird prefers open woodlands or a dead tree with fields adjoining. There he may sit for hours, but ever watchful for some movement which might indicate the presence of a gopher, field mouse, rat or even a snake. All add to his varied menu. Rodents soon become pests when these hawks are scarce. This bird often is killed by farmers and poultry raisers when the real culprit, the Cooper’s Hawk, lives on to enjoy the flock. The Red-tail’s size and habit of perching in exposed places make him a ready target for anyone who carries a gun. Slow flight combined with his habit of soaring also add to his high death rate. - Red-winged Blackbird
Red-winged Blackbird A black bird with a bright red shoulder patch identifies the adult male. Females and young are a heavily streaked gray-brown while young males are brown with an orange wing patch. In fall and winter the brilliant red shoulder patch is not so apparent, sometimes reduced to only a line. These numerous birds are slightly smaller than Robins and are abundant along ditches, ponds, lakes or other marshy areas where they nest in rushes, cattails or small bushes surrounding water. Irrigation has increased their habitat until they are one of our common birds. Vast flocks spend the winter in southern marshes. While nesting in swamps or other low areas, they range widely in search of insects and larvae and account for many which would be injurious to crops. In fall they feed heavily on weed seeds and waste grain. Huge flocks are not welcomed in the unharvested rice fields of the south. Feeding habits make him a good neighbor to everyone in his northern range before he joins the flocks of Starlings and other birds which flock to the southern areas. The male is a bigamist on occasion and often entices more than one mate to share his chosen marsh. - Reduvius (Opsicœtus) personatus
- Reindeer
Reindeer - Relationship between a mature plant of Herpomyces stylopygae and the integument of Blatta orientalis
Diagram illustrating the relationship between a mature plant of Herpomyces stylopygae and the integument of Blatta orientalis. Richards and Smith have studied the life history of Herpomyces stylopygae on the oriental cockroach. The plants grow only on living cockroaches, and the infection is disseminated by contact. - Remorse from an elephant
An elephant, from some motive of revenge, killed his cornack, or conductor. The man’s wife, who beheld the dreadful scene, took her two children, and threw them at the feet of the enraged animal, saying, “Since you have slain my husband, take my life also, as well as that of my children.” The elephant instantly stopped, relented, and as if stung with remorse, took up the eldest boy with his trunk, placed him on its neck, adopted him for his cornack, and would never afterwards allow any other person to mount it. - Representative Protozoa associated with cockroaches
Representative Protozoa associated with cockroaches. A, Monocercomonoides melolonthae, X 3094 (after Grassé). B, Coelosporidium periplanetae, X 1310 (after Sprague); trophozoite with spores and chromatoid bodies. C, Endamoeba blattae, X 273 (after Kudo); trophozoite. D, Lophomonas striata, X 330 (after Kudo). E, Lophomonas blattarum, X 660 (after Kudo). F, Retortamonas blattae, X 3094 (after Wenrich). G, Nyctotherus ovalis, X 175 (after Kudo). H, Gregarina rhyparobiae, c. X 52: mature trophozoite attached to intestinal wall of Leucophaea maderae. (Redrawn from J. M. Watson [1945].) I, Diplocystis schneideri, c. X 14.4 (after Kunstler). J, Gregarina blattarum, c. X 57 (after Kudo). K, Protomagalhaesia serpentula, X 36 (after Pinto). L, Gamocystis tenax, magnification not known (after Schneider). - Restoration of a Trilobite (Triarthrus becki), showing the Appendages
- Rhinoceros
Rhinoceros - Richardia angustiloba
Richardia angustiloba - Richardia Rehmanni
Richardia Rehmanni - Ring-billed Gull
Larus delawarensis Audubon, in 1840, referred to this species as the common American gull, but due to the change in habitat and increase in population, these birds have departed from many of their former nesting areas. However, next to the larger Herring Gull, it still is one of the most widely distributed. These birds form breeding colonies on islands in Northern United States and Southern Canada, often sharing these sites with the Cormorant and the Common Tern. Like other gulls, they are not to be trusted around unprotected nests of other species, for eggs are considered quite a delicacy in a gull’s diet. The black ring near the end of this bird’s bill is not a good field mark unless you are near or use powerful glasses to check the specimen. It looks much like a Herring Gull, except for the smaller size (18-20 inches), as compared with the 23-26 inches of the Herring Gull. The Ring-billed shows greenish-yellow legs, whereas the Herring has flesh-colored ones. Both birds show - Ringed Plover, and young ones
When young birds live in the open, as on shingly beaches, then their down is mottled. How perfectly this harmonises with the surrounding stones only those who have tried to find young terns, or young ringed plover, for example, can tell. - Robin
Robin There is no reason to tell you this bird is robin-size except that we would like you to remember he is 10 inches long. This helps when making a comparison with other birds. This medium-size member of the thrush family makes himself at home on your lawn, in your garden, pastures or fields. There you will see his reddish breast, dark head and back, all distinctive in sunlight or shadow. Yes, you can spot a Robin anywhere. The young have spotted breasts which is typical of the thrush family. Robins are early risers and start singing as soon as the first faint glow shows the approach of a new day. Robins do most of their feeding on the ground. There you will see them making a short run, then stop, look and listen. They seem to be able to hear their prey, for you will notice them digging worms and insects from depths which would make them impossible to see. These birds sometimes add small snakes, minnows or frogs to their diet of worms, insects and fruit. Hackberries, persimmons and red cedar seeds help carry them thru the winter. Robins often winter rather far north and are one of the first migrants to make an appearance in spring. - Rocky Mountain Sheep
Rocky Mountain Sheep - Rodeo Rider
Rodeo Rider - Roe deer
Roe deer - Roger Bacons diagram of the Eye
Roger Bacons diagram of the Eye - Rolling on the crimson rug
- Rooster
- root and stem and leaves of the young oak
- root of a beet plant
- Rose
Take Damask Roses, clip off the white of them, and take six ounces of them to every pint of faire water, first well boyled and scummed, let them stand so as abovesaid, twelve hours, as you doe in the Syrupe of Violets, wringing out the Roses and putting in new eight times, then wringing out the last put in onely the juice of four ounces of Roses, so make it up as before, if you will put in Rubarb, take to every two drams, slice it, string it on a thred, hang it within the pot after the first shifting, and let it infuse within your Roses: Some use to boyle the Rubarb in the Syrupe, but it is dangerous, the Syrupe purgeth Choller and Melancholly. - Rose Hip cut lengthwise to show the seeds
- Round-Leaved Sundew
Growing in poor peaty soil, and sometimes along the borders of ponds where nothing else can grow, certain low herbaceous plants, called Droseras, abound. So small and apparently insignificant are they, that to the ordinary observer they are almost unnoticed. But they have peculiarities of structure and nature that readily distinguish them. Scattered thickly over their leaves are reddish bristles or tentacles, each surmounted by a gland, from which an extremely viscid fluid, sparkling in the sunlight like dew, exudes in transparent drops. Hence the common name of Sundew by which the half-dozen species found in the United States east of the Mississippi River are known. A one-sided raceme, whose flowers open only when the sun shines, crowns a smooth scape, which is devoid of tentacles. Drosera rotundifolia, our commonest species, has a wide range, being indigenous to both Europe and America. In the United States it extends from New England to Florida and westward, and is occasionally associated with Drosera longifolia, a form with long strap-shaped leaves, but whose distribution is mostly restricted to maritime regions, from Massachusetts to Florida. - Ruby-crowned Kinglet
Ruby-crowned Kinglet When you hear this bird sing, you are impressed by the beauty of clear, but variable notes. When you check the source, you are surprised to see a tiny bird with such a big voice. His short tail might lead you to believe he is even smaller than the 3¾ to 4½ inches which he measures. His coloring is not impressive, being an olive-gray. You might notice the distinct eye ring or the prominent wing bars. If he is excited by your close inspection, he might flash the ruby crown feathers, from which he gets his name. - Ruby-throated Hummingbird
Ruby-throated Hummingbird This, the smallest bird found in the area, can be confused only with large moths such as the sphinx or hawk moths. Both the moths and hummingbirds like to feed on deep-throated flowers such as honeysuckles, petunias and trumpet-vines but the moths prefer late evening or early morning while the hummer never passes up a chance to explore such flowers with his long brush-like tongue with which he gathers nectar. This combined with small insects and spiders goes to make up his diet. Brightly colored phials filled with sugar water will attract him to your yard. Hummingbirds are among the best fliers of the bird world and can hover, fly backward or forward or straight away, whatever meets their fancy. The male has a green back and in some lights the throat patch looks black only to flash ruby red when the bird changes position so the light is reflected. The female is duller and has white feather tips on the tail. - Ruddy Duck
Oxyura jamaicensis This little duck is known by almost 100 different names in the areas where he is found. But no matter what you call him or where you find him, he is distinctive. No other duck except the Masked Duck, which is found in the West Indies, has the stiff tail which often is carried erect and fanned like a miniature sail. The male has a black or blackish-brown crown and nape, depending on the season, whether breeding or winter. The bright-blue bill, rich reddish-chestnut body and white cheek patch make the male a beautiful bird in breeding plumage. In winger the male assumes the grayish-brown coloring of the female, both showing the light cheek patch with darker crown and nape. The head, neck and feet are large for so small a bird. - Ruffs ( Machetes pugnax )
The Ruff ( Machetes or Pavoncella pugnax ) may be regarded as a long-legged Strandlooper, the only representative of his family. The beak is as long as the head (but shorter than the barrel), straight, at the tip slightly lowered and not broadened, soft all along its length, the foot is high and slender, the lower leg naked well above the hocks; of the three fronts, the middle one is connected to the outer by a tension fleece; the short, high back toe does not touch the ground; the wings are of medium length and pointed; the tail is short, composed of 12 feathers, slightly rounded at the tip. - Running Dog
- Saccopharynx ampullaceus
- Sacred Bull of Burma
- Saïga
Saïga - Salivary glands of Notonecta maculata
- Sammy
- Samson Slaying a Lion
Judges 14:6 - Sand viper
Sand viper - Sarcocaulon rigidum
Sarcocaulon rigidum - Sarcoptes scabiei, female
- Sarcoptes scabiei, male
- Sarcoptes scabiei. Diagrammatic representation of the course in the skin of man
- Sasi or Indian Antelope
Sasi or Indian Antelope - Sauvage's Mason Spider
Sauvage's Mason Spider ( Cteniza fodiens ) in her home (this is greatly shortened and shown cut lengthways) .— a) Placement of eyes (greatly enlarged) .— b) Cover seen from the inside. -C) Eggs. ). - Saw-whet owl
Saw-whet owl, by Bob Hines of the U.S. Fish and Wildlife Service, Washington, D.C. - Scheltopoesik
Scheltopoesik - Schulz's Dipper
Schulz's Dipper - Scotch Colley, or Shepherds Dog
The Scotch breed, or colley, is a light and active one, probably the best adapted for those portions of our own country where there is no danger from wild animals. It is pretty extensively diffused in the United States and British America, and is very useful to the farmer, shepherd or drover. - Screech Owl
Screech Owl The Screech Owl is the smallest of the eared owls, about robin size. In fact he often nests in holes built by larger woodpeckers such as flickers. Like other owls, he hunts at night when his quavering call blends with the murmur of the night breeze. Mice, shrews, beetles, moths, crayfish, frogs and small birds seem to furnish a well-rounded diet. These small owls have 2 distinct color phases, one a rich brown, the other a soft gray. Both blend with the bark of trees thus giving them protection. This is one of the mysteries of the bird world. Just why do these owls wear different colors? Both colors are often found in the same brood. Even tho small, they give a good account of themselves and soon let you know when they have young in the vicinity. The parents defend their young against all comers and often surprise innocent persons who may stroll too close to the young only to be attacked by the irate parents. - Sea crab
Sea crab - Secretary
- Section of Epeira Vulgaris
Section of a spider to show the arrangement of the internal organs: a, b, upper and under lips of the mouth; c, c, the œsophagus; d, f, upper and under muscles of the sucking-stomach; e, stomach; g, g, ligaments attached to diaphragm under the stomach; J, lower nervous ganglion; k, upper ganglion; l, l, nerves to the legs and palpi; m, branches of the stomach; n, poison-gland; o, intestine; p, heart; R, air-sac; S, ovary; t, air-tube; u, spinning-glands. The intestine, o, continues backward through the abdomen to the anus, in the little knob behind the spinnerete. The brown mass which surrounds the intestine, and fills the abdomen above it, is supposed to be a secreting-organ discharging into the intestine at several points. - Section through a venom gland of Latrodectus 13-guttatus showing the peritoneal, muscular and epithelial layers
- seed case of the tick trefoil
- seed of the elm tree
- Seed Sailboats
- seed which is shaped and marked like a beetle
- Seeds of the willow
- Semi-diagrammatic section through the eye of Serolis schythei
a shallow-water species (4–70 fathoms). C, lens; V, crystalline cone; R, rhabdom; N, nerve. (After Beddard.) The eyes of all the deep-sea species are relatively larger than those of the shallow-water ones, except Serolis gracilis, whose eyes seem to be disappearing. But these large eyes of the deep-sea species of Serolis are not capable of any greater perceptive power. In fact, the evidence of degeneration they show, both in minute structure and in the diminution of pigment, proves that they can be of very little use to these animals for perception.