# Polybird Oddities

An *oddity*
is a figure with binary symmetry formed by an odd number of copies of
a polyform.
Here are the minimal known oddities for polybirds
of orders 1–6.
Please write if you find a smaller solution or solve an unsolved case.
## Monobirds

## Dibirds

## Tribirds

## Tetrabirds

### Impossible

## Pentabirds

### Impossible

## Hexabirds

### 1 Tile

### 3 Tiles

### 7 Tiles

### 9 Tiles

### 11 Tiles

Last revised 2021-12-13.

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Col. George Sicherman
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