Grey-cheeked Grebe yog ib tug noog loj nruab nrab nrog lub caj dab ntev, uas feem ntau nws nkhaus rau hauv tus nuv. Nws yog ib qho yooj yim heev rau yuam nws rau ib tug os, tab sis nyob rau hauv kev muaj tiag lawv muaj me ntsis sib xws. Tsuas yog ob tug noog nyiam nyob hauv dej. Dab tsi yog qhov tshwj xeeb ntawm grey-cheeked grebe? Nws cov duab thiab cov lus piav qhia tau nthuav tawm hauv peb tsab xov xwm.
tus noog no yog dab tsi?
Grey-cheeked grebes yog tsev neeg grebe, uas suav nrog 22 hom niaj hnub no. Outwardly, lawv tau rov muab piv nrog ducks, auks thiab loons, tab sis tsis muaj kev sib raug zoo ntawm tsev neeg ntawm lawv. Tias yog vim li cas cov noog tau raug txheeb xyuas nyob rau hauv ib qho cais cais ntawm grebes.
Cov no yog cov noog uas tsis paub meej thiab ceev faj. Lawv siv sijhawm feem ntau ntawm cov dej, vim cov grebes zoo dua ntawm kev ua luam dej thiab dhia dej ntau dua li ya.
Lawv cov khoom noj muaj feem ntau ntawm cov dej hauv dej, muab lawv cov nqaij ua ntses saj thiab tsw. Vim qhov no feature, cov noog tau txais lawv lub npe tshwj xeeb thiab tsis muaj nuj nqis heev hauv kev ua noj. Tab sis lawv cov plaub yog ib zaug nrov heev. Nyob rau hauv lub xyoo pua 19th, grebe yos hav zoov yogIb qho chaw, hauv qee thaj tsam cov noog tau raug tshem tawm tag nrho.
Hnub no lawv tsis ua rau cov neeg yos hav zoov thiab cov neeg yos hav zoov zoo li no ntxiv lawm, tab sis grey-cheeked grebes hauv Phau Ntawv Liab ntawm ntau thaj tsam tseem nyob hauv cov npe ntawm cov tsiaj tsis tshua muaj lossis tsis muaj zog. Tam sim no cov teeb meem tseem ceeb rau lawv qhov kev faib tawm thoob plaws yog lub cev dej qias neeg, nrog rau cov neeg nuv ntses, uas niaj hnub cuam tshuam lawv qhov chaw zes.
Grey-cheeked grebe: yees duab thiab piav qhia
Toadstools yog cov tswv ntawm lub caj dab ntev, lub ntsej muag elongated thiab ntse, nrog rau kev nthuav ntau xim plumage. Lawv lub cev tsis tshua muaj siab tshaj 40 - 50 centimeters nyob rau hauv ntev, thiab wingspan yog kwv yees li 75 - 85 centimeters. Tsis zoo li ntau cov noog, lawv cov ntiv taw tsis txuas nrog cov khoom ua luam dej. Txhua tus ntawm lawv yog ib puag ncig los ntawm cov tawv nqaij tawv, tsim ib yam dab tsi zoo li cov hniav. Thaum ua luam dej, tus noog tsis txo nws ob txhais ceg hauv qab nws tus kheej, tab sis tuav lawv qab, tig lawv zoo li nws yog tus kiv cua ntawm lub nkoj.
Grey-cheeked grebes muaj xim greyish nyob rau lub caij ntuj no. Nrog rau qhov pib ntawm lub caij sib tw, lawv hloov pauv, muab cov plumage ci ntsa iab kom nyiam tus khub. Ib tug dub "cap" tshwm nyob rau ntawm tus noog lub taub hau, uas stretches ntawm lub hauv paus ntawm lub beak mus rau sab nraum qab ntawm lub taub hau. Nws ciam teb yog cim nrog ib tug nyias dawb kab txaij. Lub puab tsaig ntawm toadstool, raws li nws lub npe implies, coj lub teeb grey hue, thiab lub caj dab thiab lub hauv siab ua xim liab. Lub cev ntawm cov noog yog pleev xim rau grey tsaus nrog cov plaub dawb interspersed. Cov me nyuam qaib tsis zoo ib yam li xim rau lawv niam lawv txiv. Lawv npog hauv qhov tsaus greydown plumage nrog ob kab dawb dawb ntawm ob sab plhu thiab caj dab.
Lub davhlau ntawm grebe qis thiab nrawm, nws feem ntau tsis nce siab tshaj 30 meters hauv qhov siab. Nyob rau hauv cov huab cua, tus noog yog stretched thiab zoo li loj dua nws qhov loj me. Nws tsis ua haujlwm rau nws tawm ntawm qhov chaw, txhawm rau nce siab, nws yuav tsum tau tawg. Nyob rau hauv av, nws txav maj mam thiab clumsily, tab sis nyob rau hauv dej nws muaj kev ntseeg siab dua. Hauv kev tshawb nrhiav molluscs, crustaceans thiab ntses, grebe tuaj yeem dhia mus txog 60 meters tob, nrawm txog li peb meters ib ob.
Habitat
Lub ntsej muag grey-cheeked grebe nyob hauv Northern Hemisphere. Nws yug los ntawm Great Britain mus rau Russia, los ntawm Sweden thiab Finland mus rau Qaib Cov Txwv thiab lub Balkans. Cov noog no pom muaj nyob hauv Siberia thiab nyob rau sab qaum teb ntawm Far East, ntawm Kuril Islands thiab nyob rau sab hnub tuaj ntawm North America.
Rau lub caij ntuj no ya mus rau ntug dej hiav txwv ntawm Dej Hiav Txwv Atlantic, Mediterranean, Dub thiab Caspian Seas. Taug kev mus rau Is Nrias teb, Pakistan, mus rau thaj tsam ntawm Hiav Txwv Nyiv. Qee cov noog tsis ya mus, nyob rau hauv cov dej tsis khov ntawm thaj av loj, piv txwv li, hauv thaj av Great Lakes.
Grey-cheeked grebe nyiam qhov chaw nyob ntsiag to overgrown nrog reeds thiab reeds. Rau kev ua zes, nws xaiv cov dej ntiav ntiav nrog cov dej ntws qeeb, feem ntau yog cov dej ntws rov qab, pas dej, pas dej me me thiab cov swamps. Qhov tob ntawm qhov chaw no feem ntau yog li ntawm 2 txog 15 meters.
Kev ua neej
Toadstools nyob hauv cov khub sib cais thiab tsis tshua muaj kev sib sau ua ke. Txawm nyob rau hauv ib pab pawg lawv nyob deb ntawm 10-50meters. Cov no yog cov noog monogamous uas xaiv ib tus khub rau lub caij thiab pub cov xeeb ntxwv nrog nws. Lub sij hawm ua kev sib tham nrog lub suab nrov nrov thiab ua yeeb yam ntawm grebes, synchronized ua luam dej sib piv rau ib leeg, nrog rau khoom plig qab los ntawm tus txiv neej.
Cov toadstool zes yog ua rau ntawm dej, txuas nws mus rau stems ntawm cov nroj tsuag dej. Qhov no feem ntau tiv thaiv lub clutch los ntawm raccoons, raccoon aub thiab hma. Tab sis nws tsis tuaj yeem cawm los ntawm herons, hawks thiab gulls. Cov poj niam nteg qe ntawm lub sijhawm loj thiab cov menyuam qaib hauv cov menyuam yaus ib txwm muaj hnub nyoog sib txawv. Thawj lub lis piam cov me nyuam qaib tsis muaj kev ywj pheej thiab lawv niam lawv txiv nqa lawv nraub qaum. Tom qab ib tug thiab ib nrab mus rau ob lub hlis, lawv nce mus rau tis thiab tawm hauv cov brood. Ob xyoos, lawv yuav muaj peev xwm pib ib tsev neeg lawv tus kheej.
