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- The term “flying ants” (Taiwanese : 大水蟻) is a collective nickname for both termite and ant alates, with termite alates making up the vast majority.
- Their nuptial flights occur at dusk—before or after rainfall—under high humidity and low air pressure, typically from 18:00 to 19:30.
- Quick ID tip: a “sausage‑like” straight body signals a termite; a wasp‑waisted silhouette indicates an ant.：像一條香腸=白蟻，身材有腰身=螞蟻
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What Are “Flying Ants”?
夏天晚上，打開燈，就有許多小蟲飛進來，在燈旁邊飛來飛去，接著掉到地上亂爬，有些不長眼的，還會撞到你身上，大家喊牠「大水蟻」、「大水螞蟻」The
大水蟻這名字，是個統稱，包含了白蟻與螞蟻的繁殖蟻，裡面有白蟻的蟻王、蟻后，和螞蟻的雄蟻、蟻后。
大家常說的大水蟻裡面，大概有 95 % 都是白蟻。原因在於，白蟻更容易住人類附近，群體同時出飛的規模也更大。
- “Flying ants” = reproductive castes of termites and ants
- 95 % 白蟻、5 % 螞蟻的比例
- Name derives from their tendency to appear around heavy rainfall
When Do They Appear?
大水蟻集中在高濕度、高溫度的傍晚起飛，因為這種天氣，能幫助他們省力飛行，也更好找到新巢穴。
尤其是下雨前、下雨後，空氣濕度都非常高，甚至是下雨中，大水蟻都有更高的機率會出現，但這不太表出現大水蟻就是要下雨的意思The
台灣的大水蟻，集中在四到六月，在晚上的 6 : 30起飛，持續到晚上的 7 : 30，到了晚上 8 點，就幾乎都躲藏起來了。
(Timing list)
- April–June
- 18:30 – 19:30
- Warm, humid air—often before or after rain
Why Do They Fly?
這是白蟻的交配儀式，成千上萬的白蟻，會飛到光源處聚集；降落，稱為分飛。
降落後的白蟻，會開始找尋伴侶，蟻王會跟隨費洛蒙氣味，追著蟻后跑，他們會兩兩排成路隊，直到找到新家，這被稱為追尾The
找到新家後，白蟻會開始交配，產卵，逐漸建立群落，但成功率非常低，可能不到 1 %的機率，就算成功孵化出工蟻，他們生產的速度還是非常慢，通常白蟻第一年，最多只能產出 10 ~ 20 隻工蟻。
- Swarming enables mating and colony founding
- Strong positive phototaxis (light attraction)
- Colony establishment rate < 1 % for termites
Are They Harmful? What If They Enter My Home?
大水蟻無害，飛到家裡也不會怎樣，既不會攜帶病菌，也不會叮咬人類The
白蟻以吃木頭維生，常見入侵到人類家中，蛀蝕木頭家具，能夠咬壞家具的白蟻，至少都有數萬 ~ 數十萬隻以上的白蟻，要想達到這個規模，至少要花費 10 年以上才有可能The
白蟻能夠飛進你家，並活著 1 年的機率，不到 1 %，若要安穩的成長 10 年，更是微乎其微，所以若有大水蟻飛進家中，直接將它清除就好，不需要太過擔心The
Termite vs. Ant: Three‑Second Visual ID
| ey Trait | Termite | Ant |
|---|---|---|
| Antennae | 一節一珠，直線 | 彎曲肘狀，分節明顯 |
| Waist | 無「蜂腰」，粗壯 | 有明顯細腰節 |
| Wings | 前後翅同長、等色 | 前翅較長，後翅較短 |
看觸角，看腰，看翅，三秒就拆穿身份。
- 重點 1： Bead‑like straight antennae → termite
- 重點 2： Narrow “wasp waist” → ant
- 重點 3： Equal‑length wings are the tell‑tale sign of termites
How to Handle Indoor Swarms
- Turn off bright lights or switch to warm bulbs; less UV/blue light means fewer insects.
- Use a basin of water beneath a lamp on the balcony—the reflection lures alates to drown.
- Physically block entry: close windows, install screens, seal gaps.
- Use insecticides sparingly; call professionals if structural termite damage is suspected.
- 首選改光源，根本減量
- 水盆誘捕，經濟又環保
- 白蟻疑慮須專業檢測
Ecological Roles and Benefits
- Termites : expert wood decomposers that recycle dead timber and aerate soil through tunneling.
- Ants : seed dispersers and natural pest controllers; some species form mutualisms with plants.
- They are ecological heroes that become “pests” only when they overlap with human habitats.
- 螞蟻捕食害蟲，搬運種子
- 人蟲衝突源自棲地重疊
FAQ
- The name refers to their mass swarming around lights during the rainy season, especially before and after heavy showers.
- Termite mandibles are weak; they do not bite people.
- Not necessarily; they may just be attracted to lights. Still, inspect woodwork to be safe.
- Yes, but clean the zapper grid regularly to prevent clogging.
- They do not feed while airborne. After landing, termites consume wood, whereas ants hunt or cultivate fungi.
- High humidity prevents wing drying, low pressure aids flight, and predators are fewer right after rain.
- Paired individuals may live for years; single ones usually die within days.
- 看到大水蟻，就代表一定要下雨嗎?
- 不一定，只代表濕度高
