Lawrence Peregrines: Day 12!

May 25, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

For the peregrines, the morning started off under clear skies, winds from the south at 9MPH, and the temp at 57F.  The day ahead calls for sunny skies, with a high near 89. West wind 7 to 16 mph, with gusts as high as 29 mph.  Sunrise this morning was at 5:14 AM.

2018.0525.1-001This morning the chicks were first seen int he next box by themselves with the female nearby on the perch pole.  By 5:40 AM she was back in the nest box preening and scratching herself aside the chicks.  Just after that, she settled on the outer edge of the nest box looking out to the west, and the chicks remained in tight huddle formation with the the addled egg still close by.  Right about 7:30 AM, the female returned to the nest box with fresh prey and the chicks had a quick feast. Overall, The little ones are moving around more, wing stretching and being playful with each other.  They are literally a tight bunch at this age!

 

 

2018.0525.2-001As was mentioned in a prior post, the adults will shelter the nestlings from strong sunshine, and rain, as may be needed, when they are too large to brood but not yet protected by their own feathers.  The sheltering falcon half-spreads its wings, as seen in this photo.  As the overall weather warms up, and these chicks are subjected to hot, intense sunshine afternoons, this type of sheltering may be important and helpful.  The female was seen with her mouth wide open, and tongue hanging out, a clear sign of being somewhat overheated.

 

 

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

Lawrence Peregrines: Day 11

May 24, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0524.1-001The peregrines started the day off under clear skies and bright sun, calm winds, and the temp at 53F.  The day ahead calls for mostly sunny skies, with a high near 69. Light north wind increasing to 5 to 9 mph in the morning. Just before 5:30 AM, the female was seen hovering near the chicks but not really brooding them.  The little ones continue to stay close ton one another in a constant huddle formation.  By 5:30, the female moved out to the perch pole, keeping an eye on her chicks but remaining very close.  Finally, around 6:30 AM, she returned to the nest box with prey in talons and feed the hungry little ones!

 

 

 

2018.0524.2-001By day 11, the beak is already beginning to acquire a slightly yellow tinge, as opposed to the pink color it has had to this point in the chick’s development.  In regard to feeding behavior, hungry chicks solicit even if the adult arrives without food, but when satiated they remain indifferent. R. W. Nelson observed that chicks tend to form a semi-circle in front of the parent or to one side and all received portions of the prey item. Another researcher found that each chick was fed in turn until satiated, when it dropped back and was replaced by the next in line. After 10-12 days, chicks which called most received the most food

 

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

The Canadian Peregrine Foundation, Peregrine Falcon Development – Age Guide; http://www.peregrine-foundation.ca/info/ageguide.html

Lawrence Peregrines: Day 10

May 23, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

The morning started off under mostly cloudy skies, winds from the SW at 6MPH and temp at 57F.  The day ahead calls for partly sunny skies, then gradually becoming sunny, with a high near 83. Southwest wind 5 to 9 mph becoming northwest in the morning.  The sunshine will arrive later today and stay with us into the weekend.

2018.0523.2-001Just before 6 AM, the female was seen in the nest box preening, wind stretching, and watching over the little ones.  She departed and returned moments later, again with food in her talons. The hungry chicks were happy to receive a morning meal.  The egg has been moved back into the huddle!  After the feeding session, the female moved to the perch outside the box for a while, and then hopped back inside the nest box.  She settled back in for a bit, spent more time on perch and then returned to hover over her brood!

2018.0523.1-001By day 10, the chicks have already grown visibly, but remain covered in white down with pink patches of skin still showing through in some areas. Around this time, the young peregrines grow a second coat of down. From this age onwards, nestlings become more active and strong though the nature of their movements does not change markedly for another week or so. They are brooded less and less during the day and become more vigorous in their movements about the nest box, including backing up to squirt their feces outside the nest box. Vision develops strongly and the young, when hungry, scream and clamber towards an arrived parent. Most of the day is spent sleeping, up to about 16 days, but the comfort movements, become more developed, and include foot nibbling and hitching of the wings into adult position.

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

The Canadian Peregrine Foundation, Peregrine Falcon Development – Age Guide; http://www.peregrine-foundation.ca/info/ageguide.html

Lawrence Peregrines: Day 9

May 22, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

Fair skies, calm wind, 54F with sunrise time at 5:16 AM. The forecast for today calls for showers likely, mainly after 5pm. Increasing clouds, with a high near 72. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

2018.0522.1The female started the day off hovering and brooding over the chicks, including the remaining addled egg.  Towards 7 AM, she walked over to the far edge of the nest box and spent time gazing out to the west.  She will begin to do this more and more, getting the chicks use to her taking breaks, and then later breaks away from the nest box, but always nearby.  In the early afternoon, had a nice look and noticed the addled egg has been moved a bit away from the huddled chicks.  It may remain there for now, and be pushed off a bit further in next few days.  The female resumed her position at the far edge of the nest box and spent time preening herself, before feeding the chicks.

 

 

2018.0522.2In the early days, brooding and feeding are by the female alone, but the male later takes a share, though a lesser one, in feeding. Both parents are inclined to encourage the chicks to eat more than they appear to want: at 8-9 days, repeated gaping disappears, for the nestling watches the feeding actions of its parent and reaches up to take the food as it is presented. Treble whining increases in volume and is uttered between mouthfuls, but ceases when satiation is reached.

 

 

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

The Canadian Peregrine Foundation, Peregrine Falcon Development – Age Guide; http://www.peregrine-foundation.ca/info/ageguide.html

Lawrence Peregrines: wing & leg stretching

May 21, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

Monday morning starts off under clear skies, bright sun, calm wind, and 52F.  A beautiful day ahead with forecast that calls for sunny skies, with a high near 80. Calm wind becoming west 5 to 7 mph in the afternoon.

2018.0521.1-001Just before 6 AM, the female was seen brooding the 3 chicks and still keeping the addled egg close by.  A number of the chicks were seen peeping out from under Mom’s protective cover.  She rose up and walked to the edge of the nest box, rested for a time looking westward, and then departed in flight.  She is starting to spend more time at edge of nest box and not brooding the chicks. As usual she returned moments later with prey in talons.  Again, the prey had already been caught and was fully prepared for feeding the little ones.  They continue to grow in size and appetite.

2018.0521.2-001Day 8: The prey is often plucked and usually headless when received by the female, the head presumably being eaten by the male, and sometimes the neck as well.  If more work is required in plucking and preparing the carcass, the female usually flies with it to an adjoining perch before starting this.  The female at the nest box pins the prey firmly with its powerful feet and soon rips it up, giving the young tiny pieces when they are small, but larger portions as they develop.

Falcon researcher, R. Wayne Nelson, noted in his peregrine falcon research, that preening, scratching, wing/leg stretching and wing fanning movements by the young began at about 8 days, and also the first signs of actions which become marked later, such as ruffling out of feathers and shaking of the body. Locomotion is still extremely limited at this age and confined to an ineffective shuffling motion of the tarsi. Sight is good enough to allow accurate pecking at any nearby objects. While young peregrines have a marked instinct to eject excrement out of the nest box, their power of defecation is slight at first but increases steadily.

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

Lawrence Peregrines: One week and growing!

May 20, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

The peregrines started Sunday morning under overcast skies, winds from SW at 10MPH and temp at 67F. The forecast calls for showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. High near 78. Southwest wind around 10 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

2018.0520.1-001At one week of age, the chicks have already grown considerably relative to the size of the eggs they emerged from.  They are covered with fine white down, and in some places the pink skin still shows through (e.g. the crop, full of food in this photo).  On the day of hatching, and for several days after, peregrine chicks respond to creaking calls of an adult by raising their heads, opening and closing their beaks and giving faint “treble whine” begging calls in reply. Alarm calling from the adults usually puts a damper on the nestlings. The eyes of a newly hatched chick are closed and until about 4 days of age they remain either half open, or bleary and unseeing.

2018.0520.2-001Between 4 and 8 days of age a nestling begins to distinguish and react by sight to an adult in the nest box. Very young chicks spend most of their time dozing and sleeping, and huddle closely together in a white, fuzzball, single bunch. An uncovered nestling will vocalize with an call intermediate between a “treble whine” and “chitter.” Young chicks will often look out from beneath the brooding adult. DR

Lawrence Peregrines: feeding and brooding!

May 19, 2018 in lawrence peregrines, Near the Clock Tower

The peregrines started the day watching the royal wedding under fair skies, wind from the NE at 3MPH and temp at 44F.  Sunrise was at 5:19 AM.  The forecast calls for rain, mainly after 11am. High near 58. East wind 5 to 8 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

IMG_6888The female was seen brooding and feeding the chicks this morning between 8 – 9 AM.  She still keeps the remaining egg close to her, and visible, while she broods the other chicks.  A bit later, food arrives and she prepares to feed the chicks, while taking a few bites for herself.

IMG_6893The female assumes an increasingly elevated brooding position as the chicks grow, and is especially careful with her feet when rising and moving away.  The brooding female gently pulls back with the underside of its beak, as needed, one of the small chicks, which moves out from under her, as she might hook a displaced egg. Female attentiveness to brooding depends on weather, the number of nestlings, and their age.  Brooding tends to become increasingly sporadic after about the eight day.

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

Lawrence Peregrines: addled egg, not hatching

May 18, 2018 in In the Nest Box, lawrence peregrines

Just after sunrise at 5:17 AM it was mostly cloudy, wind from NE at 13 MPH and temp at 58F.  The forecast calls for mostly sunny skies, with a high near 60. East wind forecast at 11 to 13 mph.

IMG_6837The female was observed around 6:20 AM this morning feeding those always hungry and growing chicks!  The fourth egg has not hatched, and at this point, it is unlikely to hatch.  In prior years, the falcons have had unhatched eggs.  An unhatched egg, may also be referred at as an addled egg.  This is an egg in which the developing embryo has died. Not to be confused with a clear or infertile egg, though in common usage the term is often applied to any egg gone bad.

IMG_6852Around 6:20 PM, after a lot of vocalizing, the female was provided with another meal, by the male for the chicks.  The photo shows the female returning to the nest box, with prey in her bill.  The bird in her bill has been stripped of feathers and is ready for her to rip apart for feeding purposes.  Also visible is the remaining unhatched egg.  This type of egg becomes known as as addled egg. Addled eggs are usually left, and may survive after the young have gone as dried and bleached relics, kicked to the side of the nest box, but they are often broken and trampled to pieces!

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

Lawrence Peregrines: 3 hatchlings feeding!

May 17, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

The morning started off with fair skies, calm wind, and temp at 55F.  The day ahead calls for patchy fog between 7am and 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 79. Light and variable wind.

2018.0517.1-001The female was seen brooding the 3 chicks just after 6 AM this morning.  At 6:12 AM, she lifted up and walked over to the left edge of the nest box, and then hopped out onto the perch pole, for a quick bathroom break.  She hopped back into the nest box and settled back in over the chicks.  Just minutes later, she departed the nest box in flight and then returned with fresh prey…breakfast for the little ones.  The female feeds each of them with a gentle tenderness.  The fourth egg has not yet hatched, and, now, the time is growing late.

2018.0517.2-001From a growth and development perspective, the chicks are already starting to grow!   On Sunday, the adults began feeding the chicks shortly after they hatched.  At this age their eyes remain closed, but the chicks already have the instinct to crane their necks upward for food.  Over these very early days, the chicks eat and rest in a clump of whiteness.  They huddle close to one another while at rest.  They trip over each other while eating, and may even fall over if they lose their balance…..so very cute!

Lawrence Peregrines: feeding time!

May 16, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

The three chicks started off the morning under fair skies, calm winds, and temp at 56F.  The forecast for the day ahead calls for partly sunny, with a high near 61. East wind 3 to 8 mph.  Had nice looks at morning feeding session just after 5:30 AM, and the three chicks were very hungry and eager to gobble up the offered prey from the female.  The fourth and final egg remains unhatched.  Hopefully it will hatch some later today!

2018.0516-001Most brooding of the small young is performed by the female, though the male occasionally takes short turns.  No attempt is made to share brooding simultaneously.  Apart from weaker motivation for brooding, a male still has greater difficulty in covering a full brood of chicks than a clutch of eggs. Although the actions of the brooding falcon are essentially similar to those of an incubating bird, there are slight and gradual adjustments appropriate to the change of covering delicate but growing nestlings.  Leaning forward and stepping around gradually cease, but shuffling movements become important, evidently to place the feet below the chicks.  Rocking stops on hatching, and other settling motions are replaced by gentle lowering of the body onto the nestlings.

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.