Early spring migrations of birds is observed around the world. The robin is usually what one thinks of as the harbinger of spring and warm weather. Orioles, fly catchers and buntings are ones of bright colors and not easily tempted to stick around.
Depending on what type of climate you live in can dictate the best type of attraction to use. In the dry arid west water is the biggest factor. Having a hummingbird feeder will often keep hummingbirds around. Orioles like the sugar water too!
The wetter northeast places that are natural reservoirs of gnats and mosquitoes are big attractions. Having flowers like the trumpet vine are a favorite of the hummingbirds. Having a small quiet oasis will draw them in.
Make your own nectar: 1/4 c. sugar mixed with 1 c. boiling water until dissolved. Cool. Store extra in refrigerator. Do not add red food coloring as it’s detrimental to the birds health.
Orioles like oranges, peanut butter and jam. We start with an orange half and add old jam and/or peanut butter to the rind. They like berries too. Although if you have a berry patch you may find them eating them all!