ine , ▁urban ization ▁has ▁affected ▁its ▁nest ing ▁dens ities , ▁and ▁early ▁emer gence ▁of ▁the ▁B . ▁v os nes ens ki i ▁has ▁been ▁imp licated ▁in ▁the ▁increasing ▁lack ▁of ▁be e ▁divers ity ▁on ▁the ▁West ▁coast . ▁ ▁Tax onomy ▁and ▁ph y log eny ▁ ▁The ▁genus ▁name ▁Bomb us ▁– ▁the ▁b umble be e ▁– ▁ ▁comes ▁from ▁the ▁Latin ▁word ▁which ▁means ▁a ▁bu zz ing ▁or ▁hum ming ▁sound . ▁There ▁are ▁ 2 5 0 ▁species ▁split ▁into ▁ 3 8 ▁sub gener a ▁within ▁the ▁genus ▁Bomb us . ▁These ▁sub groups ▁share ▁similar ▁morph ologies , ▁despite ▁their ▁varied ▁habit ats ▁and ▁behavior al ▁patterns . ▁However , ▁many ▁of ▁the ▁groups ▁are ▁mon oph y let ic ▁based ▁on ▁the ▁distinct ▁gen ital ia ▁of ▁the ▁male ▁be e . ▁Gen etic ▁studies ▁have ▁revealed ▁the ▁b umble be e ▁to ▁be ▁closely ▁related ▁to ▁the ▁st ing - less ▁be e ▁and ▁the ▁h oney ▁be e . ▁ ▁Bomb us ▁v os nes ens ki i ▁falls ▁into ▁the ▁Bomb us ▁sub gen us ▁Py rob omb us . ▁Bomb us ▁sub gener a ▁contain ▁two ▁primary ▁morph ological ▁categories , ▁short - fac ed ▁and ▁long - fac ed . ▁Py rob omb us ▁is ▁included ▁in ▁the ▁short - fac ed ▁cla de . ▁ ▁The ▁sub gen us ▁Py rob omb us ▁is ▁both ▁mon oph y let ic ▁and ▁the ▁largest