I have had the pleasure of watching these little guys grow up. Taken at the Arizona-Sonoran Desert Museum Feb -mar 2010.
With its iridescent violet crown and flared violet gorget, the male Costa’s is a stunning sight. While some desert species nest during the nourishing monsoon rains of July, the Costa’s nest in the cooler month’s of February and March, provided lowers and insects are plentiful; it and the related Anna’s may be the only hummingbirds seen in the deserts at this season.
VOICE Call is a rich ringing, sparrowlike tsit
The mother hummingbird will eat nectar and bugs and then regurgitate it into a slurry substance the baby hummingbirds can digest. She will feed this mixture to the baby hummingbirds approximately every twenty (20) minutes. A baby hummingbird needs the mother hummingbird to feed them. Baby hummingbirds can not drink hummingbird nectar like adults do because there is not enough protein in the regular hummingbird nectar. If a baby hummingbird had only regular hummingbird nectar, the baby hummingbird would become severally crippled, or would die.
When a mother hummingbird comes to feed the baby hummingbirds, the baby hummingbirds will feel the wind from the wing of their mother and lift their little heads up and open their mouths. The mother hummingbird will insert her beak all the way down into the mouths of the baby hummingbirds while dropping a little of the regurgitated insects and nectar inside. When the mother hummingbird does this, you can see her throat swell as she pumps the baby food out of her beak in an up and down motion, kind of like a sewing needle on a sewing machine.