Almost 2000 jellyfish species have increased in population, expanded their range northward and now appear earlier in the year.
Ticks that transmit Lyme disease have spread northward into Canada, once too cold for them.
Giant squid have reached British Columbia in Canada, threatening fisheries along much of the western North American coast.
Mosquitoes carrying malaria are now found in South Korea, the Papua New Guinea highlands, places previously not warm enough for them.
Bark beetles expanded their range and have devastated forests across North America and Canada.
A microscopic parasite flourishing in warmer water is spreading a deadly disease among salmon in Alaska.