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A male pipevine swallow tail butterfly looks to land on a flowering plant at the butterfly garden near Foley Hall on Kansas University's West Campus. Monarch Watch will hold its annual fall open house at Foley Hall on Saturday.

Photo by Mike Yoder / Buy a print of this photo

Monarch caterpillars begin pupation as they suspend themselves next to chrysalides in a butterfly tent on KU's West Campus. Monarch Watch has about 300 chrysalides to give away at its open house on Saturday. Children can take them home and watch for an adult butterfly to emerge.

Photo by Mike Yoder / Buy a print of this photo

A monarch caterpillar eats its way up to a flowering blossom of a butterfly plant at the butterfly garden on KU's West Campus

Photo by Mike Yoder / Buy a print of this photo

A female pipevine swallowtail deposits her eggs on a pipevine plant in the biohouse near Foley Hall on Kansas University's West Campus. Monarch Watch will hold its annual fall open house Saturday at Foley Hall.

Photo by Mike Yoder / Buy a print of this photo

A female pipevine swallowtail deposits her eggs on a pipevine plant while a male flies past at upper right in the biohouse at Foley Hall on KU's West Campus. Twenty to 25 species of butterflies will be on display at the biohouse and on the grounds of Monarch Watch's open house on Saturday.

Photo by Mike Yoder / Buy a print of this photo

A spice bush swallowtail caterpillar settles on a leaf. The Kansas Biological Survey's Monarch Watch will hold its annual fall open house Saturday at Foley Hall on Kansas University's West Campus.

Photo by Mike Yoder / Buy a print of this photo

Eggs from a female pipevine swallowtail butterfly cling to a pipevine plant at Monarch Watch's butterfly garden.

Photo by Mike Yoder / Buy a print of this photo

In an upside-down position, a female pipevine swallowtail deposits her eggs on a pipevine plant in Monarch Watch's butterfly garden.

Photo by Mike Yoder / Buy a print of this photo

One female pipevine swallowtail, at center, deposits her eggs while a second female flies behind her at right. Monarch Watch will hold its annual fall open house Saturday at Foley Hall on KU's West Campus.

Photo by Mike Yoder / Buy a print of this photo

A black swallowtail caterpillar clings to a dill plant at Monarch Watch's butterfly garden.

Photo by Mike Yoder / Buy a print of this photo

Monarch Watch will hold its annual fall open house from 8 a.m. to 3 p.m. Saturday at Foley Hall on Kansas University's West Campus. Past open houses have averaged about 500 visitors.

Photo by Mike Yoder / Buy a print of this photo

A male pipevine swallowtail butterfly adds to the beauty of Monarch Watch's butterfly garden.

Photo by Mike Yoder / Buy a print of this photo

Sunlight highlights a male pipevine swallowtail butterfly's luminescent blue wings at the butterfly garden near Foley Hall on KU's West Campus. Many species of butterflies will be on display Saturday at Monarch Watch's open house at Foley Hall.

Photo by Mike Yoder / Buy a print of this photo

A close-up view of a monarch butterfly. The annual migration of monarchs will make its way through Lawrence within the next few days.

Photo by Mike Yoder / Buy a print of this photo

A close-up look at a pipevine swallowtail.

Photo by Mike Yoder / Buy a print of this photo