Monarch caterpillars feed exclusively on milkweed plants, and female butterflies lay their eggs on the plants so their larvae will have plenty of food. If you want to find Monarch caterpillars, either plant milkweed in your yard, or explore overgrown land in your area to find plants that are already growing. The exact appearance of milkweed will vary depending on the variety, but they typically feature a stalk with broad leaves. It's very easy to identify milkweed if it's flowering, since the flowers have a distinctive star shape. Also, if the stalk or leaves are damaged, the plant will secrete a milky fluid, which is where it gets the name "milkweed." Milkweed grows in areas where the ground has been disturbed. For example, you might find it growing along a roadside, bike path, or railroad tracks, or you could spot some in a pasture, park, or overgrown garden. Before you head out to look for milkweed plants, do an online search for pictures of the plant, or check a plant identification guide. Once you've located a milkweed plant, check it every day starting in the spring. Monarch eggs are yellow, and round, are about the size of a pencil tip, and are usually found on the underside of the leaf. There is typically only 1 egg on a leaf, and often a female monarch will only lay 1 egg on each milkweed plant. Monarch eggs hatch within 4 or 5 days, so it helps to spot the eggs as early as possible. If you haven't checked the plant for a few days, you may spot Monarch caterpillars instead of their eggs. Newly-hatched caterpillars will be about the size of a grain of rice, with smooth bodies and faint black, yellow, and white stripes. Older caterpillars will have the same distinct stripes but will be larger, growing up to 1112in (2.53.8cm) before they transform into a butterfly. To protect the fragile Monarch eggs or newly-hatched larvae, it's best to leave them on the leaf. Either snap the milkweed stalk with your hands or gently pluck off the leaf containing the egg, then carry it back to your home. Taking the whole stalk will provide you with plenty of food for your hungry caterpillar, but if you like, you can just gather a few leaves. Remember to check the whole plant to make sure it's not hiding any other insects or their eggs. If you see anything that's not a monarch caterpillar or egg, either brush away the insect or remove the leaf that contains the egg. To keep the milkweed stalk fresh, wrap the end in wet paper towels, then in aluminum foil. You could also use foam floral tubes if you have access to florist supplies. Once you get the milkweed inside, sprinkle a few drops of water onto a paper towel, then place it in the bottom of a small container, like a glass jar or a food storage container. If you brought the entire stalk of milkweed, carefully snip off the leaf with the egg, then place the leaf egg-side-up into the container. Cover the container with a lid made of mesh or one that has holes to allow air to circulate. The water on the paper towel will keep the milkweed leaf from drying out. If you found caterpillars that were already hatched, you can move them directly to their permanent enclosure, instead. When the larvae emerge from their eggs, they'll get their food and their water intake by eating the milkweed leaves they were attached to. Adding a few drops of water each day will keep the milkweed from drying out while you wait for the eggs to hatch. Keep doing this until the eggs hatch, which typically takes about 4 days. You can safely wait to move the larvae until they're about 4 or 5 days old, since they won't crawl until then. Once they're 4 or 5 days old, they should be about 1in (2.5cm) long, and they'll be ready to go to their main enclosure. If a caterpillar is crawling on a leaf, you can pick up the whole leaf and move it to a new enclosure. If it's on the bottom or side of the container, gently pick it up with your fingers to move it. By hatching the eggs in a small container, you'll be able to keep a close eye on their progress. Also, if you're raising multiple generations of caterpillars, having a separate container for hatching the eggs will help prevent the spread of illness, since you'll only be moving healthy caterpillars to the larger enclosure. If you're worried about damaging the larvae when you move them, lightly moisten the bristles of an artist's paintbrush, then slide each caterpillar onto the brush to transfer it.
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One-sentence summary -- Find or plant milkweed somewhere near you. Check the milkweed every day during the spring and summer for eggs. Cut down the entire stalk when you see eggs or larvae. Keep the eggs in a small container lined with a moist paper towel. Sprinkle a few more drops of water on the paper towel each day. Move the larvae to their enclosure within 4-5 days of hatching.

To find a vet that works with frogs, contact local veterinary schools or look online for lists of veterinarians that work with amphibians. For example, you can look at the website of the Association of Reptilian and Amphibian Veterinarians. If there are several vets in your area who work with amphibians, make sure the vet you choose is the one that has the most experience with tree frogs. It's a good idea to find a vet before your frog is actually sick. Having an established relationship with a veterinarian that treats tree frogs will make it easier to get your pet quick care when it needs it. It is best to have your frog checked out by a veterinarian if you see a symptom of illness. While you may end up bringing your pet in for a problem that is non-existent, it is better to be safe than sorry. Some diseases require quick treatment in order to be eliminated. If you suspect that your tree frog is sick but you are unsure about bringing it in to be seen by a vet, at least call the veterinary office and talk to them. Tell them about your pet's symptoms and ask them if they think your frog needs treatment. If your tree frog is indeed ill, your veterinarian will begin its treatment and will give you instructions on how to continue treatment at home. Follow these directions and be sure to continue treatment for as long as your veterinarian suggests, even if your tree frog seems completely healed. If treatment is not minimizing your frog's symptoms or they are getting worse, contact your vet once again. It may be that your frog needs a different type or amount of treatment.
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One-sentence summary --
Find a vet that is experienced with treating tree frogs. Take your frog in for an examination. Follow your veterinarian's suggestions for treatment.