The main characteristics of a bird are feathers, wings and hollow bones. No other animal has feathers. Birds fly by flapping their wings and using air pressure to create lift under their wings, just like airplanes do. The peregrine falcon(游隼) is one of the fastest birds. It can reach ...
☆ Birds are light enough to fly with the (3)___of hollow bones.Birds that can't fly:☆ Penguins are good at (45)___.☆ Ostriches are fast (46)___.Amazing (82)___about birdsSize:Hummingbirds are very (87)___while ostriches are very big.(88)___:Different ...
BIRD eggsEGGSHELLSBIRD nestsCHAFFINCHESSKYLARKBased on the analysis of egg collections of different ecological groups of birds and various literature sources, a summary of scientific studies on morphological adaptations related to the color of eggshells in birds is given. Eggshell...
各种鸟类的特征(Thecharacteristicsofvariousbirds)Avesisaclassofvertebrateinbiologicaltaxonomy.Thebirdsarebipedal,constanttemperature,oviparousvertebrates,wearingafeatheredforelimbsofwings,ahardbeak.Bird'sbodysize,thereisalsoasmallhummingbirdostrichandEMU(abodyfoundinAustralialargeflightlessbird).Atpresent,therearemore...
The rear wall of a bird's eye is densely lined with a sensory receptor layer of rods and cones that form the retina, the surface on which images are formed. The rods are sensitive to light, especially at low intensities; the more rods it has, the better a bird is able to see at ...
(1) The fruiting of 307 Ficus trees in 74 ha of lowland forest at Kuala Lompat, Malaysia, was monitored monthly for 3 years. (2) The guild of twenty-nine s... LAG Marshall - 《Journal of Ecology》 被引量: 657发表: 1991年 Keystone Characteristics of Bird-Dispersed Ficus in a Malaysia...
Bird attributes, plant characteristics, and seed dispersal of (Schott, 1858), (Euphorbiaceae) in a disturbed cerrado area 2007. Bird attributes, plant characteristics, and seed dispersal of Pera glabrata (Schott, 1858), (Euphorbiaceae) in a disturbed cerrado area. - Brazilian Journal of Biology ...
This is the core category in the sense that two-player games feel like the "best" examples of games (in the same way that the sparrow feels like a particularly good example of a bird[24]). There are countless examples, such as chess, gin, Battleship, Scrabble, tennis, most trading ca...
The extinct flying reptiles called pterosaurs were the second group of animals (after insects) to evolve flight. Most pterosaurs were about the size of modern seagulls. A few were as small as sparrows, but some of the later species were the largest flying animals that have ever lived. In ...
Body growth, muscle growth, bone growth, and measurements of muscle fiber area and fiber number were made in a line of Japanese quail (Coturnix coturnix japonica) selected for high 4 week body weight for 100 generations (line PP), in the control line from which they were derived (line CC...