Boiga is a large genus of opisthoglyphous (rear-fanged), mildly venomous snakes, known commonly as cat-eyed snakes or simply cat snakes, in the family Colubridae. Species of the genus Boiga are endemic to southeast Asia, India, and Australia, but due to their extremely hardy nature and adaptability, have spread to many other suitable habitats around the world. There are 34 recognized species in the genus. According to the study done by Jiri Smid regarding Old World cat snakes, the ancestor of the cat snake originated in Africa, from where it diversified and expanded to other countries. Despite this diversity however, the different species have very similar needs in terms of temperature and precipitation.
Amomyrtella irregularis is a species of tree in the myrtle family, Myrtaceae. It is endemic to Ecuador, where it grows in the humid forests of the southern Andes. Its common name is mate-mate.
The Viper's Bugloss(Hadena irregularis) is a species of moth of the family Noctuidae. It is found in Europe.
Carabus irregularis is a species of beetle endemic to Central Europe, Belgium, Italy, Luxembourg, Ukraine and all states of former Yugoslavia.
Nebria is a genus of ground beetles native to the Palearctic, the Near East and North Africa.
Nebria brevicollis is a species of ground beetle native to Europe and the Near East. In Europe, it is found in all countries and islands except the Azores, the Canary Islands, the Channel Islands, Franz Josef Land, Gibraltar, Madeira, Malta, Monaco, the North Aegean Islands, Novaya Zemlya, San Marino, the Selvagens Islands, Svalbard and Jan Mayen, and Vatican City. It has now been reported as introduced in western Oregon, U.S.A., where it has been found in highly disturbed sites as well as in native old-growth forest stands. It has also now been found in Washington State.
Nebria livida is a species of ground beetle with two subspecies:
Astropecten irregularis is a sea star of the family Astropectinidae. Common names include Sand sea star.
Copelatus irregularis is a species of diving beetle. It is part of the genus Copelatus of the subfamily Copelatinae and the family Dytiscidae. It was described by W. J. Macleay in 1871.
Nebria aetolica is a species of ground beetle in the Nebriinae subfamily that can be found in Albania, Greece, and North Macedonia.
Nebria dahlii is a species of ground beetle in the Nebriinae subfamily that can be found in Austria, all states of former Yugoslavia, and Italy.
Nebria kratteri kratteri is a subspecies of ground beetle in the Nebriinae subfamily that can be found in Albania, Greece, Italy, and North Macedonia.
Nebria rubripes is a species of ground beetle in the Nebriinae subfamily that can be found in France and Spain.
Nebria tatrica is a species of ground beetle in the Nebriinae subfamily that can be found in Poland Czech Republic and Slovakia.
Nebria laticollis is a species of ground beetle in the Nebriinae subfamily that can be found in France, Italy, and Switzerland.
Nebria cordicollis is a species of black coloured ground beetle from Nebriinae subfamily that can be found in Italy and Switzerland. The species is 5 millimetres (0.20 in) long.
Rhizophagus irregularis is an arbuscular mycorrhizal fungus used as a soil inoculant in agriculture and horticulture. In addition, it is one of the best mycorrhizal varieties of fungi available to mycoforestry, but as it does not produce fruiting bodies it "has virtually no market value as an edible or medicinal mushroom"
Tetrathemis irregularis is a species of dragonfly in the family Libellulidae, known as the rainforest elf. It is a tiny to small, slender dragonfly with black and yellow markings. It inhabits rainforest streams in north-eastern Australia and Southeast Asia, including the Aru Islands.
