A critically endangered bird species called the São Tomé grosbeak is the world’s largest canary, 50% heavier than the next largest species, according to a new study published in the journal Ibis. The São Tomé grosbeak (Crithagra concolor). Image credit: Alexandre Vaz / Melo et al, doi: 10.1111/ibi.12466. The São Tomé grosbeak, endemic to the island of São Tomé in the West African Gulf of Guinea, is one of the least known birds in the world. This...
