Quack Troops! Achievement in Little Kitty, Big City

For this achievement, you'll first need to reach and access the playground/pond area after getting your first fish from Crow. Once you climb to the second half of the city, Mother Duck is very big and obvious in the pond area. She will task you with finding her four ducklings and bringing them back to her. Each one is in "peril" somewhere near by, and thankfully she will mark them on your map for you (Arcade, Laundromat, Rooftop of Mayor's Shop, Southern Grocery Store), making them easy to track down and "save." If you're struggling with any, refer to the following video. This will also net you 5 of the 15 animals for Hello Everyone! (25G).

Note: Make sure to speak with each of the four ducklings before assisting them, otherwise they can't be spoken to again once you return them to their mother.