Police are investigating after finding human remains at a construction site in Greenwich last week.

The police department said that during a normal workday at a construction site in northern Greenwich, workers found what appeared to be human remains after soil was disturbed by an excavator.

The remains were carefully collected from the scene, and the Office of the Chief Medical Examiner took custody of the bones, police said.

Investigators said the remains appear to be of a considerable age.

Connecticut State Police is also assisting with the investigation.

A motorcyclist in Hebron has died after a crash along Burnt Hill Road and Cone Road, state police said.

The Connecticut State Police responded to the accident at approximately 5:25 p.m. after a dirt bike struck a rocky embankment.

According to authorities, the operator of the motorcycle failed to negotiate an “S” shaped curves in the roadway before loosing control.

The victim was originally transported via LifeStar to the hospital with reported serious injuries, authorities said.

The driver was then later pronounced dead at Marlborough Middlesex Clinic, state police said.

Anyone who may have witnessed this accident, or who may have information is asked to contact the Connecticut State Police.

It’s September and that means everyday tree swallows are putting on their spectacular autumnal avian display near the mouth of the Connecticut River.

Hundreds of thousands of the birds come from all over New England and the Canadian Maritimes to roost in the marshes just south of Essex before they head south for the winter.

These tiny native birds, with an iridescent dark blue top and white underbelly, weigh about 17 grams. Matthew Bell from the Connecticut Audubon Society said that’s about the weight of three quarters.

Bell says it’s a good idea to use binoculars to really appreciate the show which “looks like TV static or spilled cracked pepper all over your counter.”

Once they gather by the hundreds of thousands over the marshes, the tree swallows then quickly descend to pick an individual reed where each bird will spend the night.

“Sometimes it’s a plummet where every bird disappears in 30 seconds, the sky just empties out completely, other nights, it looks like a dramatic tornado,” Bell said.

He says scientists can’t say exactly why the tree swallows pick this spot every year to roost right before their migration south.

“We assume that they pick it in part, strength in numbers. Most of their predators probably can’t swim out here to get them, raccoons, skunks, stuff like that,” he said.

Raquel C. Zaldívar

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New England News Collaborative

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Boaters and kayakers gather in the river daily right before sunset to watch the birds arrive. The Connecticut Audubon Society and the Connecticut River Museum offer boat tours to experience the event but tickets often sell out quickly.

The bird numbers peak in mid-September and disappear in late October when the swallows head south for the winter.