Crested cormorant: yees duab, piav qhia, kev ua neej

Cov txheej txheem:

Crested cormorant: yees duab, piav qhia, kev ua neej
Crested cormorant: yees duab, piav qhia, kev ua neej

Video: Crested cormorant: yees duab, piav qhia, kev ua neej

Video: Crested cormorant: yees duab, piav qhia, kev ua neej
Video: What To Do About the Double-Crested Cormorant 2024, Hlis ntuj nqeg
Anonim

Lub crested cormorant, lossis Phalacrocorax aristotelis (lat.), yog qhov tsawg tshaj plaws ntawm txhua hom nyob rau hauv kev txiav txim siab. Cov no yog cov noog amazing nrog cov cwj pwm tshwj xeeb. Lawv yog cov tib neeg hauv lawv txoj kev ntes ntses, nrog rau kev siv ntau yam kev coj ua thaum lub caij sib tw. Tab sis kuj tseem muaj cov cim zoo sib xws uas txhais tau tias tag nrho cov cormorants. Piv txwv li, zes, qhov chaw nyob thiab lwm yam.

Kev piav qhia

Zoo heev pab kom paub seb lub crested cormorant zoo li cas, yees duab. Koj tuaj yeem pom lawv hauv peb tsab xov xwm. Tus noog yog qhov tsawg tshaj plaws ntawm tag nrho cov cormorants. Qhov ntev ntawm nws lub cev tsis pub tshaj 80 cm, thiab wingspan yog ib 'meter'. Nyob rau hauv qhov hnyav, noog yeej tsis nce ntau tshaj 2 kilograms, thiab txawm tias thaum lub sij hawm muaj ntau thiab pheej yig zaub mov.

crested cormorant
crested cormorant

Dub cormorants muaj qhov sib txuam ntxoov ntxoo ntawm plumage nrog cov xim ntsuab. Thaum lub caij mating, nrog rau thoob plaws lub sijhawm ua zes, cov tsos ntawm cov noog hloov pauv - ib qho me me ntawm cov plaub tshwm rau ntawm nws lub taub hau, uas sawv.

Cormorants muaj ib tug ntev beak. Thaum xub thawj nws yog liab, thiab mus rau qhov kawgtig daj. Cov tawv nqaij ib ncig ntawm lub qhov muag yog emerald, tab sis nyob ze ntawm lub hauv paus ntawm lub beak nws yog daj.

Lub plab yog tsaus, tab sis tsuas yog cov neeg laus xwb. Cov txiv neej hluas thiab poj niam sib dua. Tsis tas li ntawd, menyuam qaib yuav muaj qhov sib txawv ntawm cov plumage loj, uas tsis tau pom nyob rau hauv cov neeg laus cormorants.

Kev faib tawm

Ntiaj teb no, cov crested cormorant nyob qhov twg muaj ntug hiav txwv dej. Tsis zoo li lwm hom tsiaj zoo sib xws, nws yuav tsis tuaj yeem nyob ze cov dej tshiab. Nws raug faib raws tag nrho cov ntug dej hiav txwv Atlantic, mus txog Iberian Peninsula. Nws tseem tuaj yeem pom nyob rau sab hnub poob Africa.

crested cormorant yees duab
crested cormorant yees duab

Nyob rau thaj tsam ntawm Lavxias teb sab Federation, cormorants muaj nyob rau ntawm Kola Peninsula, nrog rau sab qaum teb thiab sab hnub tuaj ntawm Hiav Txwv Dub. Nyob ze ntawm lub pas dej no ntawm Parus pob zeb, muaj qhov chaw nyob tseem ceeb rau cov tsiaj. Feem ntau, cov noog tuaj yeem pom thoob plaws sab qab teb ntawm Russia.

Cov crested cormorant kuj tuaj yeem pom hauv Crimea. Ntawm qee qhov ntug dej hiav txwv, lawv zoo nyob ze rau tib neeg, thiab tuaj yeem pom lawv ntawm tus kheej, thiab ze heev.

Khoom noj

Hais txog dab tsi cormorants noj, nws yog thawj zaug uas yuav tsum tau xav txog txoj kev ntes cov zaub mov. Nws yog dhia dej. Yog li ntawd, yog hais tias lub reservoir muaj kuab heev, ces tus cormorant tsuas tsis tau zaub mov rau nws tus kheej.

Cov noog noj ntses mas. Feem ntau nws yog gerbil, smarida, wrasse thiab lwm yam. Tsis tshua muaj, thaum ib tug cormorant tshaib plab, nws muaj peev xwm noj tau ib tug me me crustacean tsiaj. Tab sisNws yuav tsis muaj peev xwm noj lawv mus tas li, vim lub plab zom mov yuav tsis tiv taus.

Reproduction

Thaum lub caij sib yuav, cov crested cormorant ua zoo nkauj heev, cov duab tuaj yeem lees paub qhov no. Noog zes nyob rau hauv pob zeb crevices los yog ledges nrog ib tug canopy. Lawv tsim lawv los ntawm ceg thiab qhuav algae. Lawv lub zes loj heev, qhov no yog ua kom cov me nyuam hatched xis nyob.

dub cormorants
dub cormorants

Lub caij sib tw pib thaum nruab nrab lub caij nplooj ntoo hlav, tsawg dua nyob rau lub Peb Hlis. Hauv ib lub clutch tuaj yeem muaj txog li 5 qe ntawm cov xim daj ntseg. Cov txheej txheem hatching yuav luag ib hlis, tom qab uas cov me nyuam yug los tsis muaj plumage thiab nrog cov tawv nqaij tsaus. Lawv kuj dig muag, lawv yuav qhib tau ob lub qhov muag xwb.

Plumage hauv cov menyuam yaus tshwm rau hnub 20. Ua ntej nws yog fluff. Tom qab ntawd nws maj mam muab txoj hauv kev rau coarser feathers.

Ib hlis thiab ib nrab tom qab, cov me nyuam qaib tau puv thiab npaj tawm hauv lub zes. Txawm hais tias qhov tseeb tias qhov tso qe tuaj yeem ncav cuag 5 daim, cov menyuam qaib tsawg dua, qhov siab tshaj ntawm peb. Lawv pib ya tag nrho hauv 3-4 lub hlis.

Lub sijhawm zes, cov neeg laus yuav tsis ya mus deb ntawm thaj chaw. Yog li ntawd, txhawm rau pub lawv tus kheej, lawv yuav xav tau cov ntses nyob ze ntawm ntug dej. Qhov no cuam tshuam tsis zoo rau kev khaws cia ntawm hom.

Kev ua neej

Npauj npaim tsis yog noog ib leeg. Nws feem ntau nyob hauv cov cheeb tsam. Qhov chaw zoo tshaj plaws yog lub pob zeb ntawm ntug hiav txwv dej. Tab sis cormorants tsis yogtsis kam tsim cov koog pov txwv ntawm cov kob me me.

cormorants noj dab tsi
cormorants noj dab tsi

Lub caij ntuj no ntawm cov noog tshwm sim hauv hiav txwv, nyob ze ze ze ze. Feem ntau cormorants tsis ya mus tob rau hauv av loj, tab sis qee zaum lawv ua. Hauv av, lawv tsuas pub tsis tau rau lawv tus kheej, yog li tsis muaj qhov taw qhia ntawm kev txav mus deb ntawm hiav txwv.

Yog ib tug noog nrhiav tau tej yam zoo rau kev nyob, ces nws yuav tsis pib nrhiav lwm txoj kev. Qhov no txhais tau hais tias cormorants ua rau kev ua neej nyob sedentary. Lawv txoj kev tsiv teb tsaws chaw thiab kev nom kev tswv tuaj yeem tsuas yog vim qhov chaw cia khoom muaj kuab paug dhau.

Cov cormorant yog ib hom kab mob uas yuav muaj nyob rau ntau lub tebchaws. Qhov no yog vim tsis tsuas yog lub fact tias ua ntej cov noog twb ntes tau nyob rau hauv loj qhov ntau. Qhov tseeb yog qhov chaw nyob hloov raws li huab cua thiab kub tswj kev tswj hwm. Ib txhia tsis muaj zaub mov txaus, dua vim tib neeg kev ua ub no. Yog li ntawd, yuav tsum tau siv zog los khaws cov tsiaj no.

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