In recent decades, the beaks of city Anna hummingbirds have evolved (to be) longer and larger, so as to better access the sugar water in the feeders mounted outside the dwellings, a device widely available in urban areas. (or, which are abundant in urban areas.)
Over past tens of years, the beak of Anna's hummingbird has evolved longer in order to better drink from sugary water dispenser installed outside the houses in large numbers in city areas.
【汉译英 Chinese to English】
近几十年来，城市安娜蜂鸟的喙已经进化得更长更大，以便更好地获取安装在住宅外的含糖饮水器，这种饮水器在城市地区大量存在。
近几十年来，城市安娜蜂鸟的喙已经进化得更长更大，以便更好地获取安装在住宅外的含糖饮水器，这种饮水器在城市地区大量存在。
In recent decades, the beaks of city Anna hummingbirds have evolved (to be) longer and larger, so as to better access the sugar water in the feeders mounted outside the dwellings, a device widely available in urban areas. (or, which are abundant in urban areas.)
Over past tens of years, the beak of Anna's hummingbird has evolved longer in order to better drink from sugary water dispenser installed outside the houses in large numbers in city areas.
城市安娜蜂鸟，urban Anna's hummingbirds
更大忘译出来了，dispenser 应该用复数吧