6/6 The Nest, Continued

P1010274

Eleven to fifteen days – that’s how long Blue-gray Gnatcatchers incubate their eggs. The nestlings were hatched right on schedule; the one above likely is the firstborn of the brood.

P1010276

For the next few weeks the parent birds will spend every waking minute bringing an ever increasing number of small insects for the fast growing nestlings. In one study of nesting behavior, the number of feeding trips by the adults was measured. By the twelfth day (almost fledged) five gnatcatcher nestlings were being fed sixty-seven times in two hours!

“The adults immobilize all large prey that they obtain for the young by beating it against a perch. The prey is carried to the nest in the tip of the beak and usually placed head first into the nestlings’ mouth. If a nestling has difficulty in swallowing the item, the adult removes the prey and repositions it in the nestlings’ mouth. Sometimes prey that is taken from the nestling is beaten and mandibulated by the adults before it is again fed to the young.”  The Behavior and Reproductive Success of the Blue-Gray Gnatcatcher, Richard B. Root 1969

P1010280

Only two days between the above and below images; they all have have feathers now and one opens its eyes some of the time. Hard to believe, but in less than ten days they will fledge.

P1010289

I tried repeatedly to get an image of the insects parents were stuffing into open mouths, but they were too quick for me.

P1010294

P1010293

Most visits to the nest were extremely short, and the parents dashed away before the nestlings had time to get excited.

P1010296

At this visit yesterday, the father lingered a bit longer, allowing a good view of the black facial “V” found only on breeding males.

In my human emotional way, I’ve become quite attached to the outcome of this nest. Each day I approach it with dread, knowing that a nest predator may have found it momentarily unattended. But if the nestlings don’t survive, the parent birds have a plan.

“A pair of Blue-gray Gnatcatchers can build up to seven nests in a breeding season. They often re-use nest material from previous nests, which speeds re-nesting. This can be essential to breeding success, since predation, nest parasitism, or mite infestations frequently cause nest loss and brood failure.” All About Birds, The Cornell Lab

 

 

 

 

7 thoughts on “6/6 The Nest, Continued

  1. Jim Sky

    I saw her today as I was leaving the parking lot. I tried to snap a few pictures with my new camera, which I totally haven’t been able to figure out how to use,. I tried not to disturb her too much,by standing back and being fairly still. But she seems pretty used to people. I am a newbie, so this is a first sighting of a Blue-gray Gnatcatcher for me, though I am not sure it should count because I would never have look up there but for Rosemary’s account.

    Like

  2. Jim Sky

    Oh… I forgot to say. I saw my first Yellow Billed Cuckoo on top of Iroquois Hill this week. Another heads up by Rosemary when she posted her sightings here. – thanks for posting these.

    Like

    1. oneforestfragment

      Thank-you! After I learned their vocalizations I realized that Blue-gray Gnatcatchers are fairly common birds, especially in moist, brushy areas of forests. They are so tiny (house wren size) and active that mostly we only hear them.

      Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s