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During instances where Spinney ( or to a lesser extent, Matt Vogel ) is performing on location and cannot get a video feed, a small hole is made in the costume to allow him to see.

In such cases, Big Bird must wear a necktie to cover the hole.

This can also be seen in the Sesame Street Live shows.

Likewise, during instances where Big Bird and Oscar the Grouch ( both performed by Spinney ) are to be in a scene together, Jim Martin performs Oscar unless Matt Vogel is performing Big Bird, in which cases Oscar is performed by Spinney as usual.