Animals

Monday, 20 April 2026
27 facts about turtles
27 facts about turtles
The only vertebrates so armored
The first turtles appeared on Earth at the end of the Permian about 240 million years ago. Although the first ones had neither plastron nor carapace, ...

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Basking shark
In the past, basking sharks were known as sea serpents.
Because these sharks sometimes swim in large groups on the surface, occasionally one behind the othe ...
Brittle stars
For locomotion, brittle stars use their arms.
Arms are elastic and allow the brittle star to move relatively fast. Four of five arms are used for ...
Zebra mussel
They are medium size clams, which adult forms can grow up to 5,1 cm.
Average specimen dimensions are between 25 to 40 mm in length, 13 to 18 mm in height and 17 to 23 mm in width.
Pterodactyls
Pterodactyls were not dinosaurs.
They were identified as flying reptiles. It goes for the whole clade.
Hammerhead sharks
Mostly carnivorous, some hammerhead species are omnivorous.
They feed on stingrays, small fish, and octopuses, however, 90% of bonnethead sharks’ diet consists of seagrass.
Common cuckoo
They reach sexual maturity at the age of two years.
At this time they give birth to their first brood. The female is polygamous.
Arctic fox
The mating period begins in the spring.
During this time, polar foxes search for a place to start a family. Fertilization occurs in April or May. Arctic foxes are monogamous, and males and females share the care of the offspring.
Mallard
They easily interbreed with other duck species.
Such mallards often remain fertile.
Basking shark
The basking shark is the second largest known fish in the world after the whale shark.
Along with the whale shark (Rhinocodon typus) and the megamouth shark (Megachasma pelagios), it is a plankton-eating species.
Otters
They have a high metabolic rate, and thus, depending on species, have to consume from 15% to 25% of their body weight every day.