Mammals:
* Deer and Elk: Browse on the leaves and twigs, especially during the winter.
* Beaver: Use poplar wood to build dams and lodges, and also eat the bark and cambium.
* Rabbits and Hares: Feed on young shoots and bark.
* Squirrels: Collect seeds and nuts from the tree.
* Mice and voles: Find shelter and food within the roots and fallen leaves.
Birds:
* Woodpeckers: Drill into the bark to find insects and create nesting cavities.
* Nuthatches: Climb down tree trunks to find insects and seeds.
* Chickadees and Titmice: Forage for insects in the leaves and branches.
* Owls: Nest in cavities created by woodpeckers or natural holes.
* Hawks and Falcons: Use the trees as perches for hunting and nesting.
Insects:
* Caterpillars: Many species, such as the Eastern Tent Caterpillar, feed on poplar leaves.
* Beetles: Several species, including the Poplar Borer, feed on the wood.
* Aphids: Suck sap from the leaves and branches.
* Wasps: Some species use poplar wood to build their nests.
Other:
* Fungi: Many types of fungi, including mushrooms and toadstools, grow on decaying poplar wood.
* Lichen: Certain lichen species can grow on the bark of poplar trees.
The exact species of animals that rely on poplar trees varies depending on the location and the specific species of poplar. However, it's clear that these trees provide valuable resources for a diverse range of wildlife.