Animals

Thursday, 5 March 2026
15 facts about fleas
15 facts about fleas
External parasites
Fleas are one of the most hated insects by pet owners. Once they find their way onto a dog or a cat, they are very hard to remove. Reproducing at a ve ...

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American bullfrog
It is a successful invasive species.
It has been introduced to southern North America, where is considered a threat to native amphibian s ...
Portuguese man-of-war
They are neuston organisms, which means they live on the surface of the water.
Goblin shark
Although it is a shark and shares many anatomical features with them, the goblin shark is characterized by a few different features.
They have short and rounded fins, anal and pectoral fins are larger than the dorsal fins. The caudal ...
Insects
Most insects reproduce sexually and by laying eggs.
They are fertilized internally using external genitalia. The design of the genitalia can vary signif ...
European mole cricket
Its body is dark brown with a yellowish tint to the underside.
Its body is covered with small, fine, velvety hairs that give it an iridescent reflex. It is translu ...
Blue tang
It is one of the most popular marine aquarium fish.
They have very sensitive skin, however, and are prone to diseases.
Wolf spider
Not all of them live in burrows.
Of course some wolf spider species dig themselves a burrow but there are many species of this spider ...
Brown recluse spider
Their eyes are arranged in dyads and are equal in size.
Other spiders have their eyes arranged in rows of four.
Pterodactyls
Pteranodon fossils were unearthed in North America in 1870 by the American paleontologist Othniel C. Marsh.
The placement of fossils suggests they inhabited present-day Alabama, Nebraska, South Dakota, Kansas, and Wyoming.
Vaquita
They are endemic to Mexico’s Gulf of California.
They are non-migratory, limited to a territory of approximately 4,000 square kilometers.