I-Cicadas Yesikhathi Esizayo Iphuma Ngayo Iminyaka engu-13 noma engu-17
Eyingxenyeni esempumalanga ye-United States, i-cicadas ye-periodical, okuthiwa iMicicicicada, ivela emhlabathini njalo eminyakeni engu-13 noma engu-17 lapho umhlabathi ugoqa kuze kube ngu-64 F. Ngokuvamile ukuphutha ngezinkumbi, eziyizintethe, ama-cicadas amakhulu ezinambuzane ezindiza ezindizayo , cishe ngamasentimitha ubude nengxenye, enemizimba emnyama, amehlo abomvu, namaphiko amancane. Indawo yaseBeltway- iWashington, DC , iMadrid, neVirginia- inesabelo sayo se-cicadas iminyaka eminingi.
Ngo-2017, kubonakala sengathi iqembu lamaCicadas yesifunda livele ngaphambi komjikelezo wokuphila weminyaka engu-17. Abanye ochwepheshe bathi ukuguquka kwesimo sezulu kuyisola, abanye bathi ukuqoqwa kwama-cicadas kubheka ukuphayona noma ukusheshisa inqubo yabo ukusetha umugqa omusha noma ama-brood.
Ukuphila njengeCicada
AmaCicadas aphile yonke impilo yawo ngaphansi komhlaba njengama-nymphs futhi avela njengama-cicadas amakhulu asekulungele ukushada. Uma i-cicada inenhlanhla yokubalekela izidumbu futhi iphile umjikelezo wayo wokuphila, khona-ke ingaphila amasonto amane ngaphezu komhlabathi ngaphambi kokufa. Lapho i-cicadas ivela, zikhulu kakhulu ukubala. Ubabona yonke indawo-emigwaqweni, emithini, emaphandleni nasemgwaqweni.
Ngokujwayelekile, ekuqaleni kwaphakathi kukaMeyi, ama-cicada nymphs aphuma emhlabathini, afike emithini futhi achithe izikhumba zabo. Abesilisa bahlabelela kakhulu ukuheha abalingani besifazane. AmaCicadas aphakathi kwezidalwa ezinkulu kakhulu zemvelo ezinama-decibel angu-85 kuya kwangu-100. Amantombazane abeka amaqanda awo emagatsheni emithi.
I-nymphs ihlwitha futhi igoqa amasentimitha angaphansi komhlaba. Umjikelezo ongenhla ungaphansi kwamasonto amane. Kusukela maphakathi noJuni, abantu abadala bonke bayafa. Ama-cicadas abesilisa afa ngemva nje kokulingana. Amantombazane alala amaqanda angama-400 kuya kwangu-600 ngaphambi kokufa.
Izidalwa zegazi
Ama-entomologists aphepheni "ama-brood" noma amaqoqo ama-cicadas ngonyaka nendawo.
Lezi zinhlayiya zisesimweni esifanayo seminyaka engu-13 noma engu-17 ndawonye. Kunama-broods angu-12, ngayinye endaweni ehlukile yezwe, yama-cicadas aneminyaka engu-17. Kunezinhlobo ezintathu zama-cicadas ezineminyaka engu-13. Ngenxa yalokho, kungenzeka ukuthola ama-cicadas cishe noma yikuphi unyaka ngokuya endaweni efanele.
Isibonelo, i-broods emibili eWashington, DC izakhamuzi zase-East Coast Brood II, eyaqala ukufika ngo-2013 futhi kufanele ibuyele ngo-2030, kanye ne-Great Eastern Brood X, eyabonakala ngo-2004 futhi kufanele ibuyele 2021.
Abanye ochwepheshe bakholelwa ukuthi ukuvulwa kokuqala ngo-2017 eWashington, DC kungenzeka ukuthi u-Brood X uzama ukuphuma ekuseni futhi aqale umndeni omusha.
Awukho Umoya, Awukho Umoya
Ngenhlanhla, i-cicadas ayilume noma i-sting ngakho ayilimazi kubantu noma ezifuywayo. Ngokuvamile abashiyi umonakalo ohlala njalo, ngaphandle kwalezi zihlahla ezincane kanye nezihlahla. Ukukhula komuthi kubonakala kunciphisa unyaka ngaphambi kokuvela komfanyana, ngenxa yokudla okukhulayo ezimpandeni yi-nymphs. Ungase uthole ukuthi ama-cicadas acasulayo, nakuba abaningi becabanga ukuthi ama-cicadas nomjikelezo wabo wokuphila ohlukile kuyamangalisa.
Ama-moles adla ama-cmadas ama-nymph futhi abonakala ekhula ngonyaka ngaphambi kokuvela, kodwa ahlupheke eminyakeni elandelayo ngenxa yokunyamalala komthombo wokudla.
Futhi, ama-turkeys asezindaweni ezizuzayo azuzisa kakhulu ngonyaka we-cicada okhulayo ngokugqugquzela abantu abadala emhlabathini njengoba befa.