January 28, 2016 in Red-tailed Hawk
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.
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”
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!
May 14, 2013 in Red-tailed Hawk
5 photos posted: http://www.pbase.com/birdshots/image/150381660 Click “next” in upper right to advance frmaes….enjoy!
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!
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!