六月完成的研究没看到能找到的中文报导，能在嗑药状态中渡过一生令人羡慕。
摘要：蜂鸟会偏好取食含有酒精的低度发酵蜜源。
https://royalsocietypublishing.org/doi/10.1098/rsos.230306
食果动物和食蜜动物都可能接触由代谢糖的发酵酵母产生的原生乙醇。与卡路里含量相当
的对照相比，一些食蜜哺乳动物表现出对低浓度乙醇溶液的偏好，但食花蜜鸟类对乙醇的
行为反应尚不清楚。我们调查了安娜蜂鸟（Calypte anna）的饮食偏好）用于乙醇增强蔗
糖溶液。通过重复的二元选择实验，将三只成年雄性蜂鸟暴露于含有0%、1%或2%乙醇的蔗
糖溶液中；每隔 3 小时测量一次有意识的花蜜消耗率。蜂鸟不区分 0% 和 1% 乙醇溶液
，但表现出 2% 乙醇溶液的消耗率显著降低。对蜂鸟喂食器内乙醇浓度的机会测量显示其
峰值约为 0.05%。低浓度（即高达 1%）的乙醇不会令安娜蜂鸟感到厌恶，并且可能是它
们赖以生存的天然和人为花蜜的特征。鉴于蜂鸟每天消耗大量的花蜜，因此长期生理接触
乙醇可能是大量的。
Both frugivores and nectarivores are potentially exposed to dietary ethanol
produced by fermentative yeasts which metabolize sugars. Some nectarivorous
mammals exhibit a preference for low-concentration ethanol solutions compared
to controls of comparable caloric content, but behavioural responses to
ethanol by nectar-feeding birds are unknown. We investigated dietary
preference by Anna's Hummingbirds (Calypte anna) for ethanol-enhanced sucrose
solutions. Via repeated binary-choice experiments, three adult male
hummingbirds were exposed to sucrose solutions containing 0%, 1% or 2%
ethanol; rates of volitional nectar consumption were measured over a 3 h
interval. Hummingbirds did not discriminate between 0% and 1% ethanol
solutions, but exhibited significantly reduced rates of consumption of a 2%
ethanol solution. Opportunistic measurements of ethanol concentrations within
hummingbird feeders registered values peaking at about 0.05%. Ethanol at low
concentrations (i.e. up to 1%) is not aversive to Anna's Hummingbirds and may
be characteristic of both natural and anthropogenic nectars upon which they
feed. Given high daily amounts of nectar consumption by hummingbirds, chronic
physiological exposure to ethanol can thus be substantial, although naturally
occurring concentrations within floral nectar are unknown.
喂食器内的乙醇浓度虽然看似很低，但考虑到蜂鸟花蜜消耗的高体积率，其浓度并非微不
足道。安娜蜂鸟每天必须消耗约 10 克 20% 的蔗糖溶液才能满足能量需求。即使喂食器
中典型的乙醇浓度仅为 0.02%，这样的消耗率仍相当于每日 2 毫克乙醇剂量（或约体重
的 0.04%）。相比之下，假设体重为 80 公斤，人类每天饮用一份常规啤酒（含 12 克
乙醇）相当于摄入体重的约 0.015%。
Ethanol concentrations within feeders, although seemingly low, were however
non-trivial given high volumetric rates of nectar consumption by
hummingbirds. Anna's Hummingbirds must consume about 10 g of 20% sucrose
solution daily to meet energetic needs [21]. Even if typical ethanol
concentrations in feeders are only 0.02%, such a rate of consumption would
still correspond to a daily dosage of 2 mg of ethanol (or about 0.04% of body
mass). By contrast, human consumption of one standard drink daily (containing
12 g of ethanol) corresponds to a exposure of about 0.015% of body mass,
assuming the latter to be 80 kg.