If the mother hummingbird isn't back by morning, you should quickly contact a bird rehabilitator. Don't think there is a charge. Hummingbirds and babies must eat every 15-30 minutes. Mix up some hummingbird food- 4 parts water to 1 part white sugar. Boil the water, add the sugar, stir till sugar is dissolved. Let cool to room temp. Feed babies with plastic eyedropper, slowly, one drop at a time so they don't choke. This will sustain them for a short period of time, but get them to a bird rehab fast. Call "Wild Birds Unlimited" store-or similiar stores, maybe even pet shops- to find a rehabilitator. Good Luck- hope the mom comes back!!!

Thanks for the link. Luckily, the courtyard of my condo complex has had a hummer nest 2 of the 4 years I've been here...(that I was aware of)...there's also a dove that nests in a hanging planter right outside a neighbor's door...LOL Oddly, the hummers nest just 4-6 feet off the ground!?!?! I don't think the chicks are fed much nectar...mostly bugs.

The one I have (blew down during a storm, many years ago) looks like the one IndianaKat posted, only it has many bits of lichen all over the outside. The spider web usage also allows the nest to expand as the babies need more room, they are wonders to behold! We found an egg under a feeder one day- about the size of a jellybelly jellybean, broken. We let the ants clean it up and it stayed glued to the rail all summer long. It was a great topic of conversation.

Although I have many hummingbirds year round, they have never decided to nest in my yard. :( They can choose some oddball locations that suit their fancy, such as the wind chimes mentioned above, hanging wreaths and potted plants. If you are successful, and especially if they successfully rear the young, they frequently will choose to return in subsequent years and reuse the same site.