Voorbeelden van house sparrow

• Tchernov argued that the house sparrow and related species have undergone considerable morphological changes in adapting to a commensal relationship with humans, with the beak becoming longer and narrower.

• The disappearance from the conurbations of such a common species as the house sparrow may have implications which we ought to consider seriously.

• No one disputes that the common house sparrow is a pest.

• Both the starling and house sparrow are currently listed on some of these licences.

• The birds that do most damage appear to be the bullfinch and the house sparrow.

• While changes in agricultural practices are implicated as causing declines in house sparrow numbers in farmland areas, there is no evidence of significant declines in urban areas.

• The female is effectively inseparable from house sparrow in its plumage, which is grey-brown overall but more boldly marked.

• It frequently prefers wetter habitats than the house sparrow, and it is often colonial and nomadic.

• Its flight is strong and undulating, and it gives a characteristic explosive shreep call, somewhat similar to the chirp of a house sparrow.

• It has a streaked brown back, somewhat resembling a house sparrow, but adults have a grey head and red-brown spotting on the underparts.

• A few species, like the house sparrow and northern grey-headed sparrow scavenge for food around cities, and are almost omnivorous.

• The male gives a call somewhat different from that of the house sparrow when displaying at its nest.

• The female has a darker and greyer crown and cheek than the female house sparrow and the shoulder is darker chestnut.

• Other times, they may be commensal, as when species such as the house sparrow have benefited from human activities.

• Certain species appear more susceptible than others; for example, 30% of house sparrow mortality is linked to the domestic cat.