Spring and summer bring fawns, baby birds, and bunnies that seem alone. They almost never are. Picking them up is the most common wildlife mistake Texans make - and it's usually both harmful and illegal.
The two you'll meet most
Fawns
A doe leaves her fawn hidden and still for hours while she feeds - that's normal, not abandonment. A fawn curled in the grass that isn't crying, isn't covered in fire ants, has eyes that aren't swollen, and shows no wound: leave it alone and keep pets away.
Baby birds
If the bird has feathers, open eyes, and is hopping around, it's a fledgling learning to fly - its parents are nearby. Leave it. A featherless, eyes-closed baby out of the nest may need help: gently put it back if you can reach the nest (the myth that parents reject a human-touched baby is false). A blown-down nest can be set back in the tree.
When it truly needs help: A young animal truly needs help when it's covered in fire ants, or clearly injured or sick - and also if it's cold and limp, bleeding, or you watched the parent die. Then: don't feed it (the wrong food can kill it), keep it warm, dark, and quiet in a box, and call a permitted wildlife rehabilitator.
An injured or sick wild animal
The kindest, most legal move is almost always the same: don't handle it yourself - reach a permitted wildlife rehabilitator. Rehabbers are trained and licensed to care for protected wildlife; it's hard to do right, and illegal without a permit.
-TPWD keeps a county-by-county list of permitted rehabbers. Check your county and the neighboring ones - the nearest may be a county over.
-Call before you transport anything. The rehabber will tell you if they can take that species and how to handle it.
-TPWD advises the public not to handle or move injured, sick, or orphaned wildlife. If you must move a small animal to safety, minimize contact, keep it warm and quiet, and don't offer food or water.
-Never handle a sick mammal that's acting strangely (see Diseases) - call animal control or a game warden instead.
A turtle in the road? Found a turtle crossing a road? If it's safe for you and traffic, you can move it across in the direction it was already heading - never turn it around, and never take it home.
Guidance on young and injured wildlife comes from TPWD, which keeps the county-by-county list of permitted rehabilitators. It's illegal to possess most native wildlife yourself.