Animals

Friday, 1 May 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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European pine marten
The marten's gestation period can last up to 9 months, with fetal development occurring mostly in the second half.
Between 2 and 7 young (4 on average) are born per litter. The average weight of a newborn marten is ...
Viper dogfish
They are bioluminescent.
They possess many photophores on both their bodies and undersides.
Luna moth
Number of moth generations are conditioned by the climate.
The Canadian population is univoltine, which means they have one generation a year. Central populati ...
Aye-aye
They mark their territory with a scent.
Aye-ayes rub their cheeks and necks against branches, leaving scents that deter other males from entering the territory.
Hippopotamus
Nowadays, Nile hippos live only in the central and southern parts of Africa.
They are most often found in the oases, lakes and rivers of Sudan, Somalia, Kenya and Uganda, as wel ...
Gila monster
The Gila monster can store fat in their tails, so typically three to four meals will suffice for the whole season.
Tasmanian devil
The strength of their bite relative to their body weight is one of the highest among all land predators.
Their jaws expand 75 degrees to 80 degrees and their bite force exceeds 550 N. According to the bite force quotient (BFQ), they outclass the tiger, lion, leopard, or brown bear.
Gila monster
It is closely related to four species of beaded lizards–one from Guatemala (Heloderma charlesbogerti), and three from Mexico (Heloderma alvarezi, Heloderma horridum, and Heloderma exasperatum).
Snails
The exact number of snail species is unknown.
According to estimates, there are about 85.000 of them, but the actual number is between 50.000 and 120.000 species. So far, at least 15.000 extinct species have been identified in the fossil record.
Ocean sunfish
They are a predatory species, yet omnivore ones.
They eat a lot of small fish, squids, fish larvae, crustaceans, jellyfish and salps. From time to time, they vary their diet with eelgrass. As their food may lack nutrients, they need to eat a lot.