Worst Invasive Alien Species Collection

Mature red deer stag (Cervus elaphus) near a loch. Photographed in Glen Garry, West Highlands, Scotland, UK, in February

European starling flock. Flock of european starlings (Sturnus vulgaris) being chased by a hawk. The formation of large wheeling flocks, which can contain thousands of individuals

European starling flock
European starling (Sturnus vulgaris) flock. These dense flocks of European starlings, which can contain thousands of individuals, are most often seen at twilight. Photographed in Rome, Italy

Anopheles mosquito. Coloured scanning electron micrograph (SEM) of an Anopheles stephensi mosquito, the vector for the malaria parasite in Asia

X-ray of the skull of a red fox (Vulpes vulpes)
Red fox skull. X-ray of a young red fox skull (Vulpes vulpes). Its large canine teeth are used to bite and kill small animals, although, as an omnivore, it also eats fruit and vegetables

Coloured SEM of a wasps head (Vespula vulgaris)
Common wasps head. Coloured scanning electron micrograph (SEM) of the head of a common wasp (Vespula vulgaris). Its antennae can be seen between its large compound eyes (grey, upper left and right)

Common wasp, SEM
Common wasp. Coloured scanning electron micrograph (SEM) of a common wasp (Vespula vulgaris) flying. Its large compound eyes (grey) are situated either side of its head

Large elm beetle larval galleries. Large elm beetle (Scolytus scolytus) larval galleries in the lower surface of elm tree (Ulmus sp.) bark

Potato blight on leaf. Coloured scanning electron micrograph (SEM) of the potato blight fungus Phytophthora infestans, emerging from a potato leaf

Common shore crab (Carcinus maenas) camouflaged against seaweed. This is the green form of the common shore crab. As its name suggests, this crab lives on sea shores

Birds perched on a snowman. Migratory redwing (Turdus iliacus) feeding on a snowmans eye made of a piece of apple, next to a perching starling (Sturnus vulgaris)

Long-tailed macaque mother and baby
Long-tailed macaque (Macaca fascicularis) mother and baby. This monkey is also known as the crab- eating macaque, but its diet is far more varied than that name suggests

Pregnant long-tailed macaque (Macaca fascicularis). This monkey is also known as the crab-eating macaque, but its diet is far more varied than that name suggests

Rutting red deer stag
Rutting stag. Red deer stag (Cervus elaphus) looking exhausted and muddy during the rutting season. The rutting season, which takes place in the autumn

Grey squirrel amongst daffodils eating a nut

Mosquito (family Culicidae), illustration. Although mosquitoes feed mostly on nectar, the females of most species also feed on the blood of other animals via a long proboscis

Macrophoto of Anopheles balabacensis, a mosquito
Macrophotograph of a female mosquito Anopheles balabacensis, vector of East Indian malaria, seen here feeding on blood from a human arm

Mosquito sucking blood, computer artwork. The mosquito is using its proboscis to pierce the skin of its host and suck blood on which to feed

Stereomicroscope picture of head of common wasp
A stereomicrocope photograph of the head of Vespula vulgaris, the common wasp. This is a hibernating queen. Females spend the winter in a characteristic rigid posture in a hiding place

Macrophoto of malaria mosquito, Anopheles gambiae
Malaria mosquito. Macrophotograph of an Anopheles gambiae mosquito on a leaf. Female Anopheles mosquitoes transmit malaria whilst taking blood meals from humans

Mosquito larva mouth hairs. Coloured scanning electron micrograph (SEM) of the mouth hairs of a mosquito larva (Aedes albopictus). These hairs are feeding structures used to filter water

Feeding mosquito. Macrophotograph of an Anopheles stephensi mosquito feeding on human skin. A female Anopheles mosquito feeds on vertebrate blood by using her proboscis (lower centre)

Carp
Shoal of carp. The carp (Cyprinus carpio) is a freshwater fish found throughout Asia, Europe and America. It is a bottom feeder, picking plants, insects and small animals from the riverbed

The North American bullfrog, Rana catesbeiana
Rana catesbeiana. Head of the North American bull- frog Rana catesbeiana, peering out from between leaves of grass. Its large eyes are positioned on the top of the head in order to see above

Long-tailed macaque (Macaca fascicularis). This monkey is also known as the crab-eating macaque, but its diet is far more varied than that name suggests

European wand loosestrife flowers
European wand loosestrife (Lythrum virgatum) flowers

Eichhornia crassipes Water Hyacinth B808 / 0222
blue flower of Water hyacinth. water orchid

Purple loosestrife (Lythum The Beacon )
Purple loosestrife flowers (Lythrum The Beacon )

Japanese knotweed (Fallopia japonica) growing rapidly after being cut back. Japanese knotweed is a tough, highly invasive perennial, that was introduced to this country by the Victorians

Mixed wildflowers on moorland
Wildflowers on moorland. Mixed flowering community of heathers and Western gorse on a moor. Photographed on the Horseshoe Pass near Llangollen Clwyd, Wales

Gorse (Ulex sp. )
Gorse bush (Ulex sp.)

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The invasion of alien species has brought about disastrous consequences for our ecosystems. From the majestic but destructive mature red deer stag, to the overwhelming European starling flock, these invaders have wreaked havoc on native flora and fauna. The Anopheles mosquito, a carrier of deadly diseases, poses a significant threat to human health. Even seemingly harmless creatures like the red fox and wasp can cause imbalances in delicate ecosystems as shown by an X-ray of the skull of a red fox and a colored SEM image of a wasp's head. Invasive species don't discriminate; they target both plants and animals alike. The large elm beetle larval galleries are evidence of their destructive impact on trees, while potato blight fungus leaves no mercy for crops as depicted in SEM images. The sight of potato blight on leaf serves as a grim reminder that invasive species can decimate entire harvests, and is crucial that we remain vigilant against these worst invasive alien species. By understanding their behavior and implementing effective control measures, we can protect our environment from further harm caused by these unwelcome intruders. Let us work together to preserve biodiversity and safeguard our planet from the detrimental effects inflicted by these invasive invaders.