It was a delight for my eyes to witness the return of this pair of Osprey (Pandion haliaetus). Apparently they have been migrating from South America to Silverthorne, CO to nest each April for many years. From what I have learned, the female of this pair typically arrives to the nest first, to do some house keeping. She prepares the nest, which you can see in the picture above is enormous! She catches up on her calories, while she waits for her mate. This year he was about 10 days behind her. I have to wonder, especially now that my mate takes to the skies, if she ever worries he may not arrive.
What a treat for us to watch as he dove into the pond, located across the busy road, catching fish after fish to replenish his calories after nearly 5,000 mile migration.
Size, shape, color: Ospreys are brown above and white below, and overall they are whiter than most raptors. From below, the wings are mostly white with a prominent dark patch at the wrists. The head is white with a broad brown stripe through the eye. Juveniles have white spots on the back and buffy shading on the breast.
Ospreys fly with a marked kink in their wings, making an M-shape when seen from below.
Behavior: Ospreys search for fish by flying on steady wingbeats and bowed wings or circling high in the sky over relatively shallow water. They often hover briefly before diving, feet first, to grab a fish. You can often clearly see an Osprey's catch in its talons as the bird carries it back to a nest or perch.
Habitat: Look for Ospreys around nearly any body of water: saltmarshes, rivers, ponds, reservoirs, estuaries, and even coral reefs. Their conspicuous stick nests are placed in the open on poles, channel markers, and dead trees, often over water.
Some cool facts about the Osprey:
- An Osprey may log more than 160,000 migration miles during its 15-to-20-year lifetime. Scientists track Ospreys by strapping lightweight satellite transmitters to the birds’ backs. The devices pinpoint an Osprey's location to within a few hundred yards and last for 2-3 years. During 13 days in 2008, one Osprey flew 2,700 miles—from Martha's Vineyard, Massachusetts, to French Guiana, South America.
- Osprey eggs do not hatch all at once. Rather, the first chick emerges up to five days before the last one. The older hatchling dominates its younger siblings, and can monopolize the food brought by the parents. If food is abundant, chicks share meals in relative harmony; in times of scarcity, younger ones may starve to death.
- The name "Osprey" made its first appearance around 1460, via the Medieval Latin phrase for "bird of prey" (avis prede). Some wordsmiths trace the name even further back, to the Latin for "bone-breaker"—ossifragus.
- The oldest known Osprey was 25 years, 2 months old.