Page 237 - (DK) I Can’t Believe It! 2

IT CAN’T BE TRUE! 235
B L O O D

COL ORS ELECTRICITY GENERATORS

Platypuses have electrical receptors
Not all blood is red. in their snouts to detect prey animals.

Stargazer fish shoot electric currents from
their eyes to stun their prey or drive away predators.
Electric rays can set their electric impulses to different
settings. They use a mild pulse to ward off aggressors.
To attack prey, they use the full setting of up to 220V—
Crabs have blue blood. double that of an electrical appliance in your home.
Electric eels can give off a charge of
up to 650V—strong enough to kill people.

FASTEST AND

Earthworms and SL OWES T
leeches have green blood.
HEARTBEATS
1,260
• A blue whale’s heart beats at 6 beats bpm
per minute (bpm), while a hummingbird’s
heart beats at up to 1,260 bpm.

6 bpm
Many invertebrates,
such as starfish, have
clear or yellowish blood.
SMARTEST ANIMALS

• Bees carry
a mental map
of flowers up to
3 miles (5 km)
away from their
• Ants are skillful farmers. • Crows can solve complex • Octopuses have hive. They perform “waggle
They cultivate “gardens” problems and make tools 130 million nerve cells, dances” to tell other bees
of fungi and keep aphids from sticks and wire to help 60 percent of which are where to go. The duration
for the sweet honeydew them reach food. Some are in their arms. They can play of the dance indicates the
they produce. better at problem-solving with toys, solve puzzles, and distance to food, while the
than a 5-year-old child. even learn their own names. angle shows the direction.

US_234_235_309600_Animal_Data.indd 235 19/12/17 3:48 pm