When you want to attract wildlife to your property, you should remember to keep it clean. You should use chemical-free products and GMO-free crops. You might poison your forest guest if you use commercial pesticides and fertilizers. They often contain dangerous neonicotinoids which do more harm than help. If you want to welcome wild critters in your garden, you can use home-made insecticides and make your own compost. This way you can stick to organic gardening too.
Don't forget that you shouldn't scare those delicate creatures. Any sudden moves or loud noises can startle them and they may never come back to your place. Also, make sure your pets don't disturb the wild animals. They can get hostile and hurt your dog or cat. There are cases when domestic and wildlife animals become friends, but don't risk it. Just stick to wildlife gardening and shelters. If you have trouble with maintaining your garden or designing a fake wild habitat, you can always seek the help of gardening experts around your area. They will lend you a hand and offer you useful information and advices.