what are the function of primary and secondary feathers in birds?
925008
Primary flight feathers are those supported by the bird's hand, and they provide mainly thrust. \nSecondary feathers are supported by the ulna (our cubitus), are situated in the forearm and provide lift. Thus, good gliding birds have relatively long forearms and well developed secondary flight feathers, while good "speed" flyers, and especially those with acrobatic flight such as swifts or hummingbirds, have relatively more developed hands and primary feathers.\n\nPrimaries and secondaries may differ in shape (primaries are more asymmetric, and sometimes longer) but that depends very much on the shape of the wing.
555584
Take your pick:\n\nbirds leave viable seeds in their droppings\nseeds drift in wind\nseeds catch on fur / clothing, and drop off, later\nseeds are found to be useful to humans, and we spread them\nwater (eg coconuts float, landing on distant shores, and sprouting)\n\nI am sure there are other ways...
866655
The bone has five main functions:\n\n1. Support \nThat's about everything just covered above \n2. Protection \nThey keep organs away from damage, such as the rib cage and the skull. \n3. Movement \nThat's covered above, also. \n4. Storage \nThe bone stores fat and some minerals. \n5. Blood cell formation \nThe bone is the place that most of your blood components are made.
445951
A wonderful bird is the pelican,\nIts beak can hold more than its belly can.\n\n:)
791708
By flapping. Air molecules have substance. When you push down on them they push back up with an equal and opposite force (See Newton's Laws of Physics). So when the bird flaps its wings, it pushes down, air pushes and up and this creates lift. The shape of a birds wing also helps create lift. Because a bird's wing is curved on the top, air must travel faster along the top than the bottom to meet at the end. This creates a pressure difference above and below the wing creating lift.
1036742
They huddle under the leaves of shrubs, vines, and trees. Grassland birds nest within thick grasses. Many places, though, provide no shelter. Consequently, birds have evolved rain-shedding feathers. \n\nThey stay relatively warm and dry under their feathers. Still birds get wet. ...most birds don't seem to mind. If they can't find a place to hide, they'll simply stand in the rain. After the rain--and during--they fluff up their feathers to warm up and help themselves dry off."\n\nAfter a dry spell, even with shrubs and trees galore, they sit sometimes out in the rain and take showers.
727689
Yea...I make feather pillows using whole chickens. It really saves a lot of time when it comes to plucking the feathers, but I agree with you...they are fun fun fun.
302059
No birds have any hair; maybe they have nasal feathers. Also, a fuzz buster is a radar detection device.
81308
Size: Males are larger.\nColoration: males have black and white feathers, whereas females are less conspicuous, usually grayish brown (probably for crypsis). In sexually mature animals, the legs have red plates (males), or black plates (females).\nBehavior: During the breeding season, males watch primarily for predators and/or conspecifics, whereas females have shorter vigilance periods and spend more time feeding. \nMales can be aggressive during this season.
186372
I would say feeding habits. Since most birds utilize their beaks to procure food, the beaks have evolved over time to be most advantageous to securing the type of food that bird eats (example: long, sharp beak for fishing birds).
589538
IT IS A VESTIGIAL ORGAN I.E. AN ORGAN THAT DOES NOT HAVE ANY FUNCTION IN OUR BODY BUT HAS SOME FUNCTION IN OUR ANCESTORS BODIES SUCH AS APES AND MONKEYS. IT DOES NOT HAVE TO DO ANYTHING WITH THEIR TAILS BUT DOES WITH THEIR STOMACH.\nEG: IN BIRDS THE NICTATING GLANDS OF EYES PROTECTS THEM FROM WIND WHEN THEY FLY BUT OUR NICTATING GLANDS ARE USELESS,WE INSTEAD HAVE TO USE SUN GLASSES.\nTRUST ME I JUST GAVE MY BIO. EXAM.
890775
rocks their more jaggedy, i know ur thinking they weigh the same, but a pound of rock is concentraded jaggedness, whilst feathers are all fluffy... so yeah rocks
853201
Because they have fur or feathers.
871348
What is the context? Is it possible that he means *tertiary*, which refers to a third thing ... as in primary, secondary, tertiary?\n\n(prounounced tersheeairy)\n\nThere is also TERTIAL which refers to a particular set of feathers on a bird's wing.
172274
I would call it singing like a bird, because birds have two sets of vocal cords. That's why some birds are able to sing two different parts of a song at the same time.
527975
Cause the feathers are wet and not covering it any more...he needs time to dry
952433
The adult's plumage is black and white. Its facial skin is yellow (it turns orange during nesting periods) and devoid of feathers. The tail is wedged and easily distinguished in flight. The nestlings are dark brown and gradually go light until they reach adulthood at the age of 5.\n\nYou could get more information from the link below...