
The overnight period was chilly with temperatures staying in the low thirties. Skies were partly cloudy in the morning and the temperature made its way into the low forties by noon. Astrid was in the box all night. We predicted that she would lay her third egg by midnight, but she went well north of that line. Her contractions started at 1:52 AM and she ultimately laid the egg at 1:56. Of course, it was dark inside the nest at that time, and we didn’t get to actually see the egg until the falcons switched at 6:44 AM. As for the interval between the last two eggs, certainly 64 hours is a long gap even for Astrid. Ares had been on the State Building very early on but he didn’t come to the nest until the switch. He had only been on the eggs for a few minutes when he got up and stood on the lip of the box and started calling. Astrid was on the State Building, which meant she was in view, and it was OK for him to go back to incubating. At 7:10 Astrid came to the crossperch and was giving her pterodactyl-like begging calls. She then hopped over to the west veranda. Was she telling him she was hungry? She was telling him that it was time to mate and that’s what they did a few minutes later. At 7:14 Astrid was getting on the eggs. There was food transfer at just before 8:00 AM. Ares took over on the eggs just as Astrid flew over to the hotel with her meal. While she was feeding two Pigeons hazed her – likely they were nesting beneath the broken part of the ledge.

At 9:34 AM Astrid was giving loud high-pitched warning chirps and chur-ups which usually indicate a falcon intruder. However, we didn’t see anything. She moved over to the west veranda and then we heard Ares’ distant screeching calls. She darted into the canyon just as he came into the box and got onto the eggs. At 9:42 Astrid stopped at the crossperch and issued some very emphatic vocalizations. She dashed off after that. We think she was trying to convey to him that she was hungry. He was up and out after five minutes, and she was back to the eggs just before 10:00 AM. At 10:10 we heard a gull calling in the canyon, but the falcons were not bothered by it and there was no police action required. At 10:41 Ares was up on the roof of the State Building on the northeast lookout. Most probably he was hunting. Astrid moved to the lip of the box and then flew. He took off as well. She went to the steeple perch, and him to the nest. At 11:00 Ares was on the eggs and incubating and Astrid moved to the State Building. At 11:34 Ares started giving a cackle alarm call, but he soon calmed down. Probably, he was reacting to another Turkey Vulture flying through. At 12:42 PM Astrid took over on the eggs. They switched again at 1:20. Astrid went to the steeple and Ares resumed incubating. At 2:53 Astrid came to the crossperch. She was ready to take over on the eggs, but Ares complained and didn’t want to leave. She flew off instead. She came to the east veranda a minute later and was asking to mate. He left the nest but didn’t boomerang back to mate. She flew again and the eggs were left alone for about ten minutes. Ares then came in and got back on the nest. She was on the State Building. Ares left the nest at 3:56 but then was back only moments later. Perhaps there was a mating attempt.

At 4:33 the falcons did a quick switch at the nest and Astrid took over incubating. Fifteen minutes later, Ares screeched to the box with prey. She accepted it on the crossperch and then took it over to the hotel. The eggs were then left alone for about fourteen minutes before Ares came back in and resumed incubation. Astrid was done with her meal by that time and had flown to the steeple. At 5:09 Ares was giving warning “chur-up” calls and he left the nest. It was likely he was dealing with an intruder. At 5:15 Astrid came to the nest and got onto the eggs. By this point she seemed to be in for the night and Ares was perhaps off to his night perch. The fourth and probably the last egg of the season should be laid around late afternoon on Wednesday. Goodnight all.