Highlights
Why Do Cliff Swallows Live Together?
Jack Myers Ph. D.
Animals
Cliff Swallows, Birds, Nests, Science In Action
HL
934
C1
English
9781682381946
Read about why birds called cliff swallows live in colonies.
Word lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.| List | Total | Coverage |
|---|---|---|
| Eiken Grade 1 | 3,105 | 0% |
| Eiken Grade 2 | 866 | 0.81% |
| Eiken Grade 3 | 900 | 8.89% |
| Eiken Grade 4 | 600 | 15% |
| Eiken Grade 5 | 600 | 17.5% |
| Eiken Grade Pre1 | 2,868 | 0.21% |
| Eiken Grade Pre2 | 1,327 | 1.13% |
| Eiken Grade Pre2+ | 1,562 | 1.73% |
| NDL | 875 | 21.37% |
| NGSL 1 to 1,000 | 1,000 | 18.8% |
| NGSL 1,001 to 2,000 | 1,000 | 3.2% |
| NGSL 2,001 to 3,000 | 801 | 1.5% |
| NGSL Supplemental | 52 | 7.69% |
Grammar lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.| List | Total | Unique | Coverage | Unique |
|---|---|---|---|---|
| Eiken Grade Pre1 | 94 | 94 | 0% | 0% |
| Eiken Grade 2 | 123 | 122 | 0% | 0% |
| Eiken Grade Pre2 | 111 | 108 | 0% | 0% |
| Eiken Grade 3 | 48 | 47 | 0% | 0% |
| Eiken Grade 4 | 52 | 49 | 0% | 0% |
| Eiken Grade 5 | 176 | 139 | 0% | 0% |
| A1 | 352 | 316 | 0% | 0% |
| A2 | 949 | 893 | 0% | 0% |
| B1 | 1,126 | 1,106 | 0% | 0% |
| B2 | 775 | 760 | 0% | 0% |
| C1 | 402 | 395 | 0% | 0% |
| C2 | 312 | 308 | 0% | 0% |