Red-tailed Hawk: Lawrence

January 28, 2016 in Red-tailed Hawk

CF2C5812-001Noticed a number of Blue Jays pestering a larger bird that landed in a tree along the Merrimack River in Lawrence.  Upon drawing closer, discovered it was a Red-tailed Hawk!

Red-tailed hawk chicks continue to grow…..

May 22, 2013 in Red-tailed Hawk

According to Birds of North America, developmental asynchrony among chicks (runting) and sibling aggression may occur when food is scarce.  At a nest  where food delivery was low and one chick was dominant to its nestmate, the female parent preferentially fed the dominant chick and frequently pecked the subordinate. There was violent sibling aggression in this nest, and the subordinate chick did not survive to fledging.  Young are generally fed the same foods as adults eat.  Early in the nestling period, adults typically remove unused prey from the nest within a day of deposition. In contrast, old carcasses may be allowed to accumulate in the nest late in the nestling period.

Red-tailed Hawk chicks….now 3!

May 20, 2013 in Red-tailed Hawk

The Red-tailed hawk chicks now number 3!  two are larger in body mass than the third smaller one, so time will tell if the third chick is strong enough to make it in the fight for food.  According to Birds of North America the male provides most of the food for the female and their brood from hatching, although female may occasionally vacate the nest for brief hunts.  For the first 4–5 wk after hatching, prey is torn into small pieces for nestlings by the female; thereafter prey is deposited in the nest for nestlings to tear and eat.  Generally, prey are delivered to nestlings 10–15 times/d from just before sunrise to just after sunset.  Delivery rate and prey biomass vary among individual birds and are affected by brood size and prey availability.

5 photos posted including adult female watching and guarding from a nearby roof top: http://www.pbase.com/birdshots/image/150392080   Click “next”

Red-tailed Hawk chicks growing!!

May 16, 2013 in Red-tailed Hawk

From Arthur Cleveland Bent: “The young, when half grown, become very lively, walking about in the nest, stretching or flapping their wings, backing up to the edge of the nest to void their excrement in a long stream far over the edge; the ground under a nest of young hawks is well decorated with a circle of white. Their eyes are very keen, and they frequently raise their heads to watch passing birds or to look for the return of their parents.”

4 photos posted:  http://www.pbase.com/birdshots/image/150392076    Click “next” in upper right corner to advance frames….enjoy!

Red-tailed Hawk chicks

May 14, 2013 in Red-tailed Hawk

The Hawk chciks continue to grow and it appears that there may be a thrid chick in the nest!  The female  otday brought a pigeon back to the nest and tore apart the bird to feed the eager chicks!

5 photos posted:  http://www.pbase.com/birdshots/image/150381660    Click “next” in upper right to advance frmaes….enjoy!

Red-tailed Hawk hatches chicks!!

May 13, 2013 in Red-tailed Hawk

Finally after dropping eggs around March 26th, the RTH has hatched her eggs.  For the moment it looks like 2 chicks, but it’s always important to be patient and maintain a sharp lookout for all nest activity.  The feeding activitiy has picked up during the day with many trips out and back for food.  My friends report that the first egg hatched around May 1st and they have been observing closely since then!

Red-tailed Hawk

April 24, 2013 in Red-tailed Hawk

The Red-tailed continues her steadfast incubating duties awaiting the hatching of the first chick!

Red-tailed Hawk

April 22, 2013 in Red-tailed Hawk

The Red-tailed continues to be patient in incubation mode!

Red-tailed hawk continues to incubate

April 18, 2013 in Red-tailed Hawk

The Red-tailed continues to incubate the eggs.  incubation period expected to last 28-32 days!

Red-tailed Hawk, nesting in Lawrence

April 10, 2013 in Red-tailed Hawk

Red-tailed Hawk female incubating eggs on nest near Lawrence General Hospital.  The female has been consistently on the eggs with relief provided by the male for short times during the day.  The hatch date is projected to happen around the last week of April.

3 Photos posted: http://www.pbase.com/birdshots/2013redtailedhawk   Click “next” in upper right corner to advance frames!