Urban nature involves...

1. Animals

1.1. Herbivores

1.1.1. squirrels

1.1.2. chipmunks

1.1.3. deer

1.1.4. mice

1.2. Omnivores

1.2.1. rats

1.2.2. raccoons

1.2.3. humans

1.3. Carnivores

1.3.1. coyotes

1.3.2. foxes

1.4. Insects

1.4.1. bees

1.4.2. ants and termites

1.4.3. mosquitoes

1.4.4. beetles

1.5. Birds

1.5.1. pigeons

1.5.2. hawks

1.5.3. swallows

2. Plants

2.1. trees

2.1.1. maple

2.1.2. oak

2.1.3. sycamore

2.1.4. locust

2.2. grasses

2.3. shrubs and flowers

3. Built infrastructure

3.1. roads

3.2. buildings

3.3. canals

3.4. railroads

3.5. bridges

4. Natural areas

4.1. vacant lots

4.1.1. paved

4.1.2. dirt

4.2. parks

4.2.1. public parks

4.2.2. gardens

4.2.3. yards

4.2.4. playgrounds

4.3. rivers, lakes and oceans

5. Fungi & algae

5.1. molds

5.2. mushrooms

5.3. seaweeds