Jaarlijks wordt er op Wereldproefdierendag, 24 april, stil gestaan bij de vele dieren die in laboratoria zijn overleden.

April 25th is World Penguin Day. This celebratory day coincides with the annual northern migration of Adelie penguins.

World Tapir Day is celebrated on 27 April each year and exists to raise awareness about the species of tapir that inhabit Central and South America and Southeast Asia and to raise funds to purchase land to protect it from human encroachment.

Wild Koala Day is a day to celebrate wild koalas and protect their habitats. On Wild Koala Day, 3 May,

On May 4, animal advocates celebrate Respect for Chickens Day.

World Migratory Bird Day (WMBD) is an annual awareness-raising campaign highlighting the need for the conservation of migratory birds and their habitats, it has a global outreach and is an effective tool to help raise global awareness of the threats faced by migratory birds, their ecological importance, and the need for international cooperation to conserve them.

Endangered Species Day is an opportunity for people of all ages to learn about the importance of protecting endangered species and everyday actions they can take to help protect them.

The purpose of World Turtle Day, May 23, sponsored yearly since 2000 by American Tortoise Rescue, is to bring attention to, and increase knowledge of and respect for, turtles and tortoises, and encourage human action to help them survive and thrive.