Spring is an important time of yearfor birds to lay2 eggs and raising theirbabies. But first things first they need tobuild their nests. Birds don’t live innests， but they build them to have a safeplace to lay and incubate3 their eggs andto raise their babies.

Birds use many materials4 to buildtheir nests， for example， sticks， lichen，spider silk， bark and mud. Different birdsmake different nests. Some nests are assimple as a scrape5 on the ground， othersare carefully6 built.

One kind of nest you might usuallysee is called a cup nest， as it’s the style7made by many garden birds， includingrobins and blackbirds.

Stay well away from their nests. Youcan also help the birds in spring byleaving behind the materials they need tobuild nests， such as sticks or dry grass.

The time it takes for a bird to buildits nest depends8 not only on the kind ofbird but also on its living place. Birdswill change theirnest -making stylewhen something isdifferent aroundthem， such as howmany parasites9there might be.

As our towns grow， we’re cominginto close contact with birds so it’s moreoften to find human-made10 materials inbirds’nests. They will be found more inthe nests of land11 birds than in those ofmarine12 ones.

Everything about making nests is useful， so we can know more about birds.

春天是一年中鳥類產(chǎn)卵和哺育幼鳥的重要時期。但是首先，它們需要筑巢。鳥類不在巢中生活，它們建造自己的巢是為了有一個安全的地方來產(chǎn)卵和孵化它們的蛋，并養(yǎng)育它們的孩子。

鳥兒用許多材料筑巢，例如樹枝、地衣、蜘蛛絲、樹皮和泥土。不同的鳥做不同的窩，有些巢穴就像在地上刮出的洞一樣簡陋，有些則是精心建造的。

你可能經(jīng)常看到一種被稱為杯狀巢的鳥巢，因為這是許多花園鳥類筑的樣式，包括知更鳥和烏鶇。

請遠(yuǎn)離鳥兒的巢穴。你也可以在春天留下筑巢所需的材料來幫助它們，比如樹枝或干草。

一只鳥筑巢所需的時間不僅取決于鳥的種類，還取決于它居住的地方。當(dāng)周圍情況———比如寄生蟲的潛在數(shù)量———發(fā)生變化時，鳥兒會改變它們的筑巢方式。

隨著我們城鎮(zhèn)的發(fā)展，我們與鳥類的接觸越來越密切，因此在鳥巢中發(fā)現(xiàn)人造材料的頻率越來越高。它們更多會出現(xiàn)在陸地鳥類的巢中，而不是海洋鳥類的巢中。

關(guān)于筑巢的一切信息都是有用的，這樣我們就可以更了解鳥類。