Another 70 percent said planned conservation activities had been cancelled or postponed. The delays, which have pushed a slew of critical projects back to at least the spring of 2021, include time-sensitive conservation work based on factors such as the migration of animals and mating seasons. For example, the release of endangered Madagascan big-headed turtles can only be carried out during the spring rains, which provide optimal water levels for the reptiles to be freed.