The conversation had moved from zoos to other matters.
Natural wetlands were dug up and replaced with concrete paths and constructed ponds, claiming to protect them. Yet, the original water plants and reeds were completely gone, and so was the ecological function of the wetland.
Then there were the abandoned farms that turned into wastelands. Trees were planted, which improved the scenery, but the animals weren't buying it. Grass and sedge plants covered the ground. What seemed like barren wasteland was actually a paradise for rodents and birds.
The bright lights of the city at night had a huge impact on animals.
Many birds relied on natural light for navigation during nocturnal migrations. Artificial light sources could lead them to misjudge directions, fly in the opposite way, collide with other birds in the migration flock, or crash into buildings.