I nā makahiki i hala iho nei, me ka hoʻomaikaʻi ʻana o ke kaiaola, ua hoʻonui ʻia ka nui o nā manu, a ua piʻi mālie ke ʻano o ka pōʻino manu i loko o ka māla. Ma hope o ka ʻai ʻia ʻana o ka hua e nā manu, ua ʻulaʻula ia, ua nalowale kona waiwai waiwai, a ua hoʻopōʻino hou i nā maʻi a me nā mea ʻino, a ua lilo i mea hoʻokele waiwai nui i ka poʻe mahiʻai huaʻai. ʻO ka hapa nui o nā manu e ʻai ana i nā hua i loko o ka māla ʻai, he mau manu maikaʻi lākou, a he nui nō hoʻi nā holoholona i mālama ʻia i ka ʻāina. No laila ka nui o nā mea kanu i kēia manawa e hoʻohana nei i nā ʻupena pale manu e pale aku i nā manu mai ke komo ʻana i nā mea kanu a me nā kumulāʻau hua.
ʻO ka ʻupena Anti-bird he lole pūnaewele i hana ʻia me ka polyethylene a heald wire me ka anti-aging, anti-ultraviolet a me nā mea hoʻohui kemika ʻē aʻe ma ke ʻano he kumu kumu. Loaʻa iā ia nā hiʻohiʻona o ka ikaika tensile kiʻekiʻe, ke kūpaʻa wela, ke kūpaʻa wai, ka pale ʻana i ka corrosion, ke kūpaʻa ʻelemakule, ka mea ʻawaʻawa a me ka ʻono ʻole, a me ka maʻalahi o ka hoʻolei ʻana i ka ʻōpala. Hiki ke pepehi i nā mea ʻino maʻamau, e like me nā nalo, namu a pēlā aku. ʻO ka hoʻohana maʻamau o ka hōʻiliʻili māmā, ke ola mālama kūpono a hiki i 3-5 mau makahiki. No laila hiki iā ʻoe ke hoʻohana me ka hilinaʻi. A loaʻa nā ʻano hoʻohana like ʻole.
He ʻenehana mahiʻai hou ka mahiʻai ʻana i ka ʻupena pale manu. Ma ka uhi ʻana i nā ʻauheʻe no ke kūkulu ʻana i nā pale hoʻokaʻawale ʻokoʻa, hoʻokaʻawale ʻia nā manu mai ka ʻupena, ʻoki ʻia nā manu mai nā ala hānau, a mālama pono ʻia ka lawe ʻana i nā ʻano manu āpau a pale ʻia ka pōʻino o ka hoʻoili ʻia ʻana o ka maʻi maʻi. A loaʻa iā ia ka hopena o ka hoʻouna ʻana i ka māmā a me ka malu maʻalahi, e hana ana i nā kūlana kūpono i ka ulu ʻana o ka mea kanu, e hōʻoia ana e hoʻemi nui ʻia ka hoʻohana ʻana i nā pesticides kemika i nā māla mea kanu, e hana ana i nā mea kanu o ke ʻano kiʻekiʻe a me ke olakino, a hāʻawi i kahi hōʻoia ʻenehana ikaika no ka ka hoʻomohala ʻana a me ka hana ʻana i nā huahana mahiʻai ʻōmaʻomaʻo ʻole pollution. ʻO ka ʻupena anti-manu kekahi hana e pale aku ai i nā pōʻino kūlohelohe e like me ka holoi ʻino a me ka hoʻouka ʻana i ka huahekili.