The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
Dentro del libro
Resultados 1-5 de 18
Página 84
... nests in the spring ) that the winter of 1854-5 destroyed four - fifths of the birds in my own grounds ; and this is a tremendous destruction , when we remember that ten per cent . is an extraordinarily severe mortality from epidemics ...
... nests in the spring ) that the winter of 1854-5 destroyed four - fifths of the birds in my own grounds ; and this is a tremendous destruction , when we remember that ten per cent . is an extraordinarily severe mortality from epidemics ...
Página 90
... nests ; and Col. Newman , who has long attended to the habits of hum- ble - bees , believes that " more than two - thirds of them are thus destroyed all over England . " Now the num-- ber of mice is largely dependent , as every one. 90 ...
... nests ; and Col. Newman , who has long attended to the habits of hum- ble - bees , believes that " more than two - thirds of them are thus destroyed all over England . " Now the num-- ber of mice is largely dependent , as every one. 90 ...
Página 91
... nests of humble - bees more numerous than elsewhere , which I attribute to the number of cats that destroy the mice . " Hence it is quite credible that the presence of a feline animal in large numbers in a district might deter- mine ...
... nests of humble - bees more numerous than elsewhere , which I attribute to the number of cats that destroy the mice . " Hence it is quite credible that the presence of a feline animal in large numbers in a district might deter- mine ...
Página 221
... nest in holes in banks ! In cer- tain other districts , however , this same woodpecker , as Mr. Hudson states , frequents trees , and bores holes . in the trunk for its nest . I may mention as another illustration of the varied habits ...
... nest in holes in banks ! In cer- tain other districts , however , this same woodpecker , as Mr. Hudson states , frequents trees , and bores holes . in the trunk for its nest . I may mention as another illustration of the varied habits ...
Página 324
... nests of birds , which vary partly in de- pendence on the situations chosen , and on the nature and temperature of the country inhabited , but often from causes wholly unknown to us : Audubon has given several remarkable cases of ...
... nests of birds , which vary partly in de- pendence on the situations chosen , and on the nature and temperature of the country inhabited , but often from causes wholly unknown to us : Audubon has given several remarkable cases of ...
Otras ediciones - Ver todas
Términos y frases comunes
adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young