The primary concern of the present chapter is the question of how bird flight develops within the life span of the individual. This ontogenetic problem involves the consideration of evidence from embryology, neurophysiology, neuroanatomy, genetics, natural history and comparative/evolutionary studies, and...
The number of flights carried out per day, the flight duration, the time spent flying, the time spent soaring and the size of the home range increased with age. Older fledglings in broods of two were more precocious and active in flight than their siblings. Early self-feeding both on ...
is also the most common form of defense in reptiles. At the first recognition of danger, mostsnakesandlizardscrawl or scamper away into the undergrowth;turtlesandcrocodilesplunge into water and sink out of sight. Even so, should danger arise so suddenly and so close at hand that flight may ...
Studies investigating the evolution of birds (Aves) have focused heavily on feather development and the skeletomuscular adaptations required for flight1,2,3. From a physiological standpoint, flapping flight deserves special attention as the most metabolically intense form of vertebrate locomotion4, requir...
Readers will not only discover the origin of birds but will also learn how the respiratory system of theropod dinosaursworked and may have transformed into the avian one. In addition, the work explores such aspects as swallowing mechanism in birds, the adaptations that have evolved for flight at...
(Payne 2005;Sorenson and Payne 2005). Many cuckoo species are difficult to study, as they live in the tropics where the birds are difficult to observe and the nests are well hidden. Hence, the majority of our knowledge of brood parasitism has been acquired from investigations on a few ...
Aircraft: A motor vehicle or contrivance now known or hereafter invented, used or designed for navigation of or flight in the air, except a parachute or other contrivance designed for such navigation but used primarily as safety equipment. Aircraft Landing Field: An area of land or water which...
facility of China Agricultural University (Zhuozhou, China). The feed composition and nutrient specifications are outlined in Table S3. All birds in this study had ad libitum access to feed and water. The environmental conditions, including room temperature and humidity, were automatically regulated ...
The disproportionate effect of global warming on the arrival dates of short-distance migratory birds in North America Recent studies have shown that, in response to global climate change, diverse avian taxa are now nesting measurably earlier (< 10 days) in both the United ... CJ Butler - 《...
Of note, transferring international passengers are able to visit 5A-level scenic areas for free if they show their Nanning Wuxu International Airport, or Guilin Liangjiang International Airport, flight boarding passes within one month of landing. ...