Interactions Between a Sloth and a Brown Jay

Published this month in the journal Frontiers in Ecology and the Environment is a new observation that brown jays feast on the moths and other insects that live within a sloth’s fur.

A sloth’s fur is full of moths, insects, algae and fungi. The moths use the sloth’s travelling ecosystem to find mates and lay their eggs. The sloth also eats the algae that grows on itself as a supplement to its diet. Hence the pilfering by brown jays might not be such a welcome addition to this little ecosystem.

However, due to the abundance of parasites that also lives in sloth fur, the birds may be doing them a favour. In addition, brown jays may alert the sloth to presence of predators in the area, giving them a heads-up, as generally they are very slow to respond.

Understanding how organisms interact through natural history and descriptive ecological research can help us make important scientific advancements and practice conservation more effectively.

 

slothbrownjay

Read the entire article here.

 

 

 

Sloths & Moths

Scientists studying sloths have recognized a syndrome of mutualism between sloths, moths and algae, that could explain how the sloth overcomes its “laid-back” lifestyle.

We discovered that sloths consumed algae from their fur, which was highly digestible and lipid-rich. By descending a tree to defecate, sloths transport moths to their oviposition sites in sloth dung, which facilitates moth colonization of sloth fur. Moths are portals for nutrients, increasing nitrogen levels in sloth fur, which fuels algal growth. Sloths consume these algae-gardens, presumably to augment their limited diet. These linked mutualisms between moths, sloths and algae appear to aid the sloth in overcoming a highly constrained lifestyle.

threetoedslothandmoths

The original journal paper can be downloaded from here, or you can watch this short YouTube clip explaining it in layman’s terms!