Add spaces: Description:Twobirdsinaflockofabout15birdsofthespeciesWhite-belliedparrot,theywereinvestigatingpossiblenestingholesintherainforest.

Answer: Description: Two birds in a flock of about 15 birds of the species White-bellied parrot, they were investigating possible nesting holes in the rainforest.

Add spaces: Thespermcellscansurviveforamaximumof3days.

Answer: The sperm cells can survive for a maximum of 3 days.

Add spaces: Theleftsidewallcanberolledupandthefrontwalldetached.

Answer:
The left side wall can be rolled up and the front wall detached.