| migratory bird | 32 |
| small bird | 14 |
| modern bird | 4 |
| flying bird | 3 |
| game bird | 3 |
| living bird | 3 |
| large bird | 2 |
| secretary bird | 2 |
| build nest | 0.73 |
| eat seed | 0.72 |
| eat insect | 0.72 |
| fly | 0.72 |
| take flight | 0.71 |
| lay egg | 0.70 |
| build their nests | 0.70 |
| find food | 0.68 |
| fly in the air | 0.67 |
| spread their wings | 0.66 |
| More » |
| mess | 0.61 |
| billions of dollars | 0.53 |
| unexpected and unusual … | 0.25 |
| feather | 0.76 |
| wing | 0.73 |
| beak | 0.66 |
| their babies | 0.61 |
| call | 0.61 |
| hand | 0.61 |
| enough room | 0.60 |
| story | 0.60 |
| hollow bones | 0.60 |
| leg | 0.60 |
| More » |
| water | 0.73 |
| food | 0.64 |
| space | 0.60 |
| fresh water | 0.53 |
| safe place | 0.43 |
| dinosaur | 0.72 |
| animal | 0.67 |
| wild animals | 0.57 |
| eagle | 0.57 |
| bald eagle | 0.54 |
| direct descendants of d… | 0.52 |
| modern feathered dinosa… | 0.45 |
| prey animals | 0.38 |
| among the most intellig… | 0.32 |