Hummingbird feeder action increasing
This past week we saw a definite increase in hummingbird visits to our feeders in Cheatam Co. Like other songbirds Ruby-throated hummingbirds are nearly through raising young for this year. It’s no coincidence that more hummingbirds will begin visiting feeders more often for the next 2 months. August and September are THE busiest hummingbird feeding months here in Middle TN. With nesting responsibilities concluded hummers will begin taking advantage of feeders in an effort to pack on as much fat as possible in preparation for their migration back to Central and South America. Ruby-throated Hummingbirds (RTH), like many migrant birds, go through hyperphagia prior to migration, meaning they eat almost continuously. They ramp up their consumption of nectar from plants and sugar water from feeders while consuming large quantities of tiny insects that are full of fats and proteins. The sugar is used up almost instantly during daily activities but the protein from insects helps strengthen their flight muscles. All the energy-rich yellow fat accumulates in little storage pockets which are visible when the feathers are gently pushed aside, like when a licensed bander has one in hand.
Male Ruby-throated Hummingbird
Female Ruby-throated Hummingbird
Hummingbird fat pockets
An adult male RTH will weigh approximately 3 grams during summer but put on as much as 2.5 grams of weight by the time it is ready to head south. They will nearly double their weight during hyperphagia.
So, if you haven’t been paying attention to your feeders because of lack of activity make sure your feeders are clean and you have fresh nectar made of a 1 part sugar to 4 parts water ratio.
And if you get a chance visit Warner Parks while they are banding in August and September and see those little fat pockets for yourself.