Tus cowbirds 'zes tus cwj pwm yuav zoo li lim hiam lossis ntse, nyob ntawm koj qhov tshwj xeeb khoov, tab sis nws yog tib txoj kev uas lawv yuav tsum tau yug dua tshiab. Lawv ua tsis tau lub zes ntawm lawv tus kheej, yog li ntawd lawv yuav tsum tso siab rau lwm tus noog ob qho tib si txhawm rau txhawm rau lawv cov qe thiab tsa lawv cov xeeb ntxwv.
Npauj npaim puas tu me nyuam mos?
Nkauj noog tab tom nrhiav zes ntawm lwm cov noog vim tias lawv yog cov kab mob hu ua brood parasite: Ib niam txiv cowbird nteg nws cov qe rau hauv zes ntawm lwm cov noog. Tsuas yog li ntawm 1 feem pua ntawm txhua hom noog tau txais lwm tus los tsa lawv cov menyuam. Hauber hais tias " kev saib xyuas niam txiv yog tus nqi," Hauber hais. "Nws siv sijhawm ntau los saib xyuas koj cov qe.
Cov noog puas tua lwm tus menyuam noog?
Nkauj noog nteg qe rau hauv lub zes ntawm lwm tus noog thiab cia cov niam txiv yug menyuam yug nyuj nrog rau lawv tus kheej. … Cov menyuam mos ntawm European cuckoo, kuj yog cov kab mob uas muaj npe nrov, mus rau ib kauj ruam ntxiv thiab tua lwm tus menyuam mos thaum lawv yug menyuam. Tab sis me nyuam nyuj nyuj feem ntau tsis tua lawv cov phooj ywg zes.
Pob nyuj pub lawv cov me nyuam?
Nyob ib txwm niam txiv kuj tseem yuav pub cov me nyuam yaus uas nyob hauv zes mus txog thaum lawv laus txaus tawm. Fledgling cowbirds yog ib tug dull greyish-xim av xim, thiab yuav ze li ntawm lawv cov neeg laus loj (txog qhov loj ntawm starling), uas feem ntau txhais tau hais tias cov niam txiv yuav pub ib tug me nyuam loj dua lawv tus kheej.
Ua nyuj sib nraus ua rau lawv tus kheejzes?
Nqaij qaib yog cov kab mob ua rau cov menyuam yaus, txhais tau tias lawv yeej tsis tsim lawv lub zes. Es tsis txhob, lawv nteg qe nyob rau hauv lub zes ntawm host hom, thiab cia cov niam txiv tsa lawv cov me nyuam qaib. Cowbirds yog zes generalists, thiab tau pom los nteg qe nyob rau hauv lub zes ntawm 247 ntau hom noog!
