March 23, 2007
Walking through Peace Park, I found several hundred Colletid bees digging nest holes along the bank of the creek. Back the next day with my camera, I saw several bees entering and leaving holes. One bee was in a hole facing out of the entrance when another bee approached. They faced each other close together at the entrance for a moment, then switched locations with the bee originally in the hole leaving the area and the newcomer taking up watch at the entrance.