The Nile Perch can grow up to 2 meters and weigh up to 200 kg. This fish managed to invade Lake Victoria and easily eat many of the haplochromine prey there, in addition to outcompeting them.
GeographySiberian Taiga takes up an area of ~10 million km² in Russia alone. To cross it would take months of doing nothing but wondering through the forest. From above, trees look like grass on a grass field, yet each is ~30m tall.