How can you differentiate between the sexes of the common raven?
156281
Take him to your local brid bander...a professor of ornithology at your local college... he will blow on the feathers just above the anus in an upward direction, this patch of skin will have variations based on sex.  A female will have a more fatty patch of padding in this area.  A brood patch.
239582
Male : Boar\nFemale: Sow\nBaby: pup
501578
1. The barber shaves himself. Because you have written "He shaves ALL and...". All includes himself as well.\n\n2. No, it dosen't support the logic. Ravens could be "Non-black", but still be Ravens.\n\n3. He will hand the baby back. If he was so intent of eating the baby, he would probably have not proposed the question to Melissa in the first place.\n\n4. Lets take two cases...\n\nCase 1...Suppose A is dog.\n\nThen, according to the conditions given,\nB is dog, C is wolf, D is dog, E is wolf, and A is wolf...which contradicts our assumption.\n\nCase 2...Suppose A is wolf.\n\nThen, according to the conditions given,\nB is wolf, C is dog, D is wolf, E is dog, and A is dog...which contradicts our assumption again.\n\nThus, there are no fixed species of animails here, or the data given is insufficient.
765754
I don't think they are strictly male....rather a type of penguin.  Check out the link:
63704
They are birds. \nThey lay eggs.
422039
I'm pretty sure the male sparrow has black feathers on the top of his head and the female is just plain brown.
470672
Assuming that you're in the U.S. and you're talking about the Northern Mockingbird (Mimus polyglottos), the answer is yes. Both sexes sing. Males are more vocal and louder, but females sing and imitate too. Females are at their most vocal in the fall and sing rarely in spring and summer.
224928
Well I love birds, I have bird feeders out in my yard and in front of my windows so I can easily watch them. There are so many different types that come to eat and as I watch them I notice that some of the finches look very much alike but are different breeds. You can look at the shape of a bird body, wing span, colors especially and markings and determine the type of bird, if it is native to your area or visiting, if it is male or female. I have a bird book I like to use, its called, wild birds of north America. It has tons of color photos and info. If you want to draw lots of interesting birds, try a thistle feeder instead of mixed wild bird seed. This will draw in the finches and other colorful small birds that you don't see flying around that often.
605774
Swans and ducks belong to the same family (Anatidae) but different subfamilies. \n\nSwans belong to the subfamily Anserinae. Some of their characteristics are: \n- Long neck\n- The plumage lacks metallic colors or a speculum (patch of conspicuous coloring in the wings)\n- No sexual dimorphism (males similar to females); also the calls of both sexes are similar\n- A single annual molt (after breeding)\n- Monogamous, they form life-long or long-lasting couples, and both male and female care for the chicks,\n- This is not so easy to see, but the pattern of scales on their legs is reticulate\n\nSubfamily Anatinae (typical ducks):\n- Most species with a speculum on the wing, with metallic colors\n- Most with sexual dimorphism: usually the males are more "gaudy" and their voices may be different\n- The males have sexual parades different from the females, and in many species the plumage of the male during the breeding season is very noticeable, but they have an -\ninconspicuous non-breeding plumage (which means that they undergo 2 yearly molts)\n-The males usually do not participate in incubation or care for the chicks,\n- Different pattern of leg scales\n\nAnd in case you were wondering, the geese are also Anserinae. \nNot all ducks are Anatinae. The whistling ducks belong in their own subfamily, the Dendrocygnini, and their characteristics are somewhat more similar to the swans than to the "typical ducks".
406429
The simplest animals do not have seperate genders.  They are not male or female, but rather male and female combined.  We call them hermaphrodites, after a Greek mythological figure, the child of Hermes and Aphrodite who was both male and female.\n\nThat we are descended from hermaphrodites is demonstrated by our embryological development.  Before we're born, we all start off as neutral-sexed organisms, with both sets of the organs that will become testes or ovaries.  With a few exceptions, people with XX chromosomes lose the testes and the ovaries develop, making them female, while people with XY chromosomes lose the ovaries, develop the testes and become male.
560885
You would think that the pecking itself or the usage pattern of (as it were) of the pecker would be enough to identify not only the sub-species but the individual, however, there is not scientific evidence to show that this is the case. \n\nIt is possible through the use of photgraphs of the peckers to identfy even beyond the sub-species to the invidual (there are a few famous cases of this).
441057
An immature bird has speckled brown feathers all over, the distinctive head and body plumage arriving 2–3 years later, before sexual maturity. Adult females have a wingspan of approximately 2.1 meters (7 feet); adult males have a wingspan of 2 meters (6 feet, 6 inches). Adult females weigh approximately 5.8 kg (12.8 lb), males weigh 4.1 kg (9 lb).\n\nhttp://en.wikipedia.org/wiki/Bald_eagle
584664
Well I don't know a whole lot about birds - especially their cadence - but, Orioles are known to occupy Massachusetts, so is the Bay-Breasted Warbler, and the Carolina Wren, all have black body feathers and at least an orange throat or belly.\n\nHopefully that helps?
23695
"What's the difference between crows and ravens?\nRavens are about 1/3 larger than crows. They have somewhat heavier bills, more fan-shaped tails, sometimes they have a ruff (mane) of feathers around the throat. But essentially, crows and ravens are identical in color, shape - and most importantly - behavior.\n\nCrows and ravens are competitors, and both species are seldom found in the same locale. Ravens are most often found in heavily wooded, mountainous, cold, or desert regions. Crows may be spotted in more temperate, mixed habitat areas.\n\nNorthern ravens (those of Arizona) are transglobal, and found around the world. There are 42 species of crows and ravens (corvidae) found in all parts of the world from the arctic to the tropics, excepting (for reasons known only to God) South America.\n\nMost of them are very similar, predominantly black birds. The American crow is typical, and found throughout the United States, except Hawaii. Other US species include the fish crow (a bit smaller than the common crow) found mostly in southeastern coastal and riparian regions; the Pacific Northwest crows are much like the American crow, and, in fact, may be (according to one's favorite taxonomist) only a subspecies."
1042037
Color. Males have more of a red breast where females have more of a brownish color on their breast.
598831
Earthworms are hermaphrodites.  Other types of worms look different; females tending to be larger than males, for one thing.
89516
male peacocks (the ones with the bright plumage) are called peacocks, females are properly called "peahens".  Although many people incorrectly like to refer to both as peacocks.\n\nhope this helps :-)