Large and heavy birds usually use soaring flight during long-distance migration or make regular stopovers en route for substantial refuelling. Purple Herons are large, long-distance migrants. Because of their size, large herons migrating southwards from Europe to Africa were expected to make one or...
Most migrating(迁徙的) birds fly between cold and warm places,partly to avoid the winter.Their trips are tiring and dangerous—fewer than half of first-time migrating birds make it back the next year.Small birds often fly at night,stopping during the day to rest.Large bir...
and some antelopes in Africa migrate so as notto be caught in droughts.T here is evidence to suggest that animals that migrate possess a sort of inbuilt"compass".In one experiment , some starlings were taken from their usual habitat in Holland , toSwitzerland.When these birds migrated , they...
Birds need to look for food to live through another reason is that they want to have baby birds.There are about 9,000kinds of birds in the world, and about 600kinds of birds migrate. Some birds can fly a very long way. Sometimes they fly to other countries. We have fewer birds ...
With their advanced mobility, birds often migrate over thousands of kilometres... NM Yamaguchi,Y Arisawa,Y Shimada,... - 《Journal of Ethology》 被引量: 57发表: 2012年 The feeding ecology of the Lesser Vasa Parrot, Coracopsis nigra, in south-eastern Madagascar European Honey-buzzardPernis ...
In the avian world, where diversity spans from tinniest hummingbirds to largest eagles, there are a group of birds that command respect due to their sheer size. The biggest birds in the world tell a story of ecological balance, survival strategies, and the challenges they faced. ...
The yellow-breasted bunting was considered a critically endangered species by the International Union for Conservation of Nature in 2004 due to a rapid drop in population size. The species breeds in Europe and northern Asia, and then migrates yearly to parts of Asia, including India, southern Ch...
(however, few other extant specialized frugivores are also outliers). Estimates of mean dispersal distance by oilbirds are the largest reported, and we confirm that some living frugivores currently fulfil roles of seed dispersers and ecosystem services previously assumed to be only performed by ...
Birds with plumage colour aberrations are of interest to both the general public and scientists. However, due to their rarity in nature, information on the presence of colour aberrations is rarely found in the peer‐reviewed literature. Exploration of public observations using modern information ...
highlight that brain size evolution may also be influenced by constraints2,3,35, such as the need of a long developmental period to grow a disproportionally larger brain, and selective pressures favouring smaller brains, such as those associated with long-distance movements in migratory birds. ...