Lawrence Peregrines: a rest day between eggs!

April 8, 2018 in In the Nest Box

2018.0408.1-001Just after 6AM, had a nice look on the nest box, under fair skies, light winds from the north at 6MPH, and temps just below freezing, and a wind chill around 25F.  The female departed the nest box for a while, as is normal firth thing in the morning.  As the eggs are being laid, it is normal for the female to spend time warming the eggs, and time outside the nest box, but near by.  Whne she is up and out, it provides a nice look at the reddish brown eggs.

 

 

2018.0408.2-001In the middle of the day, she is seen incubating the eggs, with her tail pressed down firm behind her, and her wing tips a bit up in the air, all to help her keep the warm air in!  The winds remained light and temps warmed up to just over 40F.

 

 

2018.0408.3-001At the end of the day, another chance to view the eggs while the female is out on another well deserved break.  The winds had picked up quite a bit from the NW at 16MPH, and gusts up almost 25MPH.

Lawrence Peregrines: Two eggs!

April 7, 2018 in In the Nest Box, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0407-001The weather improved from earlier this morning with rising temps and clearing skies.  By the middle of the day the sun came out full force, big winds from the west at 17MPH, gusts up over 25MPH, and temps in the mid-forties.  Made a look a bit after 2pm and what a nice surprise to find the second egg.  The last look was around 10:30 AM….so this second egg was laid middle of the day.  In the past number of years, at this nest location, the first three eggs have usually been laid overnight and about 48 hours apart.  This egg was laid at a bit of a longer interval, at about 56 hours apart.  If this year is somewhat like years past, we are likely to see the next egg on Monday morning, or a bit later in the day…..stay tuned!

Here, the female had departed the nest for a short break, returned to the nest box, and perched for a moment on the outer edge looking in!

Lawrence Peregrines: waiting for second egg!

April 7, 2018 in In the Nest Box, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0407.2-001Had some time to get up and watch from just after 6AM, with the female in and out of the nest box.  At 7AM, it was snowing lightly with winds from SW at 6MPH, and temp around 37F.  The female was seen perched just outside the nest box.  After initial egg is laid, the female will hover over and/or incubate the egg, particularly if the temperature is at or near freezing.  At this point in the egg laying process, active incubation has yet to begin.  Thought we might see the second egg, but it may be just a bit delayed and coming later today!

Lawrence Peregrines: first egg late in day

April 5, 2018 in In the Nest Box, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0405.4It is always a joy-filled day when the first egg is laid, and the new breeding season is underway.  It has been a dramatic week with “Crash” getting caught in a major altercation, and having the nest taken over by another peregrine falcon, and then his death.  The first egg has been laid just under 6 days after the big fight.  The female is right on schedule despite this major, unexpected change.  She laid her first egg almost to the day a year ago, and then laid 3 more eggs in the following days.  Once you see the first egg, you can’t help but look in again, and again!  Great news!

Lawrence Peregrines: First egg!!

April 5, 2018 in In the Nest Box, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0405.1Here we are at minutes before 6AM, with sunrise at about 6:16AM, and looking in on the female.  It sure looks like she is hunkered down tight on her fist egg.  But, not yet able to confirm until she lifts up, and provides a look!  She is seen here in typical incubation posture, providing every indication that the first egg has been laid.

 

 

2018.0405.2A few minutes before 8AM, the male returns to the nest box with prey in bill and offers it to the female who has maintained her incubation posture.  As she receives th eprey, she does little to help confirm that the first egg has been laid!

 

 

 

2018.0405.3Finally after waiting and waiting, the female laid her first egg early this morning well before sunrise.  Her behavior was very consistent with the general lethargy that a female falcon typically experiences  in the few days prior to laying the first egg.  In many cases this lethargy may last a week or longer.  She lazes around and spends lots of time in the nest box, nest scraping, and other courtship related activities.

Incubation usually will not begin until the second to last egg has been laid.  In this colder weather, the female will spend time incubating the egg, but it may not be a non-stop effort!

Literature cited:

Nelson, R.W. 1971. Captive breeding of peregrines: suggestions from their behavior in the wild. Raptor Research News 5(2):54-82. 

Lawrence Peregrines: even more scraping!!

March 28, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0328-001Another beautiful morning with a few clouds, winds SE 3MPH, and temp around 37F.  The female continues to leave the nest box for a while and then return; again she enters the nest box and repeats the process of laying out horizontally and pushing the gravel around.  This helps her to fashion the nest bowl to her liking and is all part of the preparing for egg laying!

SCRAPING: Either bird can do this. The falcon runs its breast through the substrate or nest depression, pushing out with its legs behind. The bird is forming the nest cup (scrape), but this is also part of courtship. Scrapes may be made at several potential ledges before one is finally chosen for laying.

Literature Cited:

Cade, T. J., J. H. Enderson and J. Linthicum. 1996a. Guide to Management of Peregrine Falcons at the eyrie. Boise, ID: The Peregrine Fund, Inc. (Excerpt: Linthicum, Janet. Observing Breeding Behavior)

Lawrence Peregrines: more scraping!!

March 27, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0327-001Another beautiful morning with clear skies, bright sun, little wind, and temp around 24F.  The female continues to leave the nest box for a while and then return; again she enters the nest box and repeats the process of laying out horizontally and pushing the gravel around.  This helps her to fashion the nest bowl to her liking and is all part of the preparing for egg laying!

SCRAPING: Either bird can do this. The falcon runs its breast through the substrate or nest depression, pushing out with its legs behind. The bird is forming the nest cup (scrape), but this is also part of courtship. Scrapes may be made at several potential ledges before one is finally chosen for laying.

Literature Cited:

Cade, T. J., J. H. Enderson and J. Linthicum. 1996a. Guide to Management of Peregrine Falcons at the eyrie. Boise, ID: The Peregrine Fund, Inc. (Excerpt: Linthicum, Janet. Observing Breeding Behavior)

Lawrence Peregrines: nest scraping

March 26, 2018 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0326-001Another beautiful morning with clear skies, bright sun, winds N 12MPH, and temp around 30F.  The female continues to leave the nest box for a while and then return; again she enters the nest box and repeats the process of laying out horizontally and pushing the gravel around.  This helps her to fashion the nest bowl to her liking and is all part of the preparing for egg laying!

SCRAPING: Either bird can do this. The falcon runs its breast through the substrate or nest depression, pushing out with its legs behind. The bird is forming the nest cup (scrape), but this is also part of courtship. Scrapes may be made at several potential ledges before one is finally chosen for laying.

Literature Cited:

Cade, T. J., J. H. Enderson and J. Linthicum. 1996a. Guide to Management of Peregrine Falcons at the eyrie. Boise, ID: The Peregrine Fund, Inc. (Excerpt: Linthicum, Janet. Observing Breeding Behavior)

Lawrence Peregrines: mutual ledge display

March 25, 2018 in In the Nest Box, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0325.2-001Observing the peregrines through the New Balance Falcon Cam under mostly cloudy skies, wind from NW at 17MPH with stronger gusts, and temp in mid-thirties.

An awesome opportunity to observe as the male flew into the nest box and walked to the back near and below the web cam. His leg bands were visible and allowed for positive ID.  Minutes later, the female landed on the perch pole, then hopped her way inside the nest box.  They looked at each other for a moment and then proceeded to engage in normal courtship behavior known as mutual ledge display, which included touching their bills together many times….not often seen, and a magnificent sight to behold!

Mutual Ledge Display: Often this is precipitated by a male or female ledge display. The other bird joins the first on the ledge and both bow and ee-chup over the scrape, sometimes touching bills. This can also happen outside the eyrie.

Billing: Billing is often seen during the longer mutual ledge displays and occasionally when the pair is perching very close together. Billing involves twisting the head sideway especially by the female, and nibbling between beaks. The female’s head is usually very low with her beak directed upward, while the male faces downward. If billing occurs during a mutual ledge display, the normally loud Eechip vocalization tends to diminish toward Peeping and quiet female Chupping-incomplete variations of the Eechip sound unit.

Literature Cited:

Cade, T. J., J. H. Enderson and J. Linthicum. 1996a. Guide to Management of Peregrine Falcons at the eyrie. Boise, ID: The Peregrine Fund, Inc. (Excerpt: Linthicum, Janet. Observing Breeding Behavior)

Wrege, P. H. and T. J. Cade. 1977. Courtship behavior of large falcons in captivity. Raptor Res. no. 11:1-46.

Lawrence Peregrines: pushing gravel around again!

March 24, 2018 in In the Nest Box, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

2018.0324-001The female will leave the nest box for a while and then return; she usually enters the nest box and repeats the process of laying out horizontally and pushing the gravel around.  This helps her to fashion the nest bowl to her liking and is all part of the preparing for egg laying!

SCRAPING: Either bird can do this. The falcon runs its breast through the substrate or nest depression, pushing out with its legs behind. The bird is forming the nest cup (scrape), but this is also part of courtship. Scrapes may be made at several potential ledges before one is finally chosen for laying.

Literature Cited:

Cade, T. J., J. H. Enderson and J. Linthicum. 1996a. Guide to Management of Peregrine Falcons at the eyrie. Boise, ID: The Peregrine Fund, Inc. (Excerpt: Linthicum, Janet. Observing Breeding Behavior)